GitHub/LineageOS/android_kernel_samsung_universal7580.git
17 years agoecryptfs: allow lower fs to interpret ATTR_KILL_S*ID
Jeff Layton [Thu, 18 Oct 2007 10:05:17 +0000 (03:05 -0700)]
ecryptfs: allow lower fs to interpret ATTR_KILL_S*ID

Make sure ecryptfs doesn't trip the BUG() in notify_change.  This also allows
the lower filesystem to interpret ATTR_KILL_S*ID in its own way.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
Cc: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: intel_cacheinfo: fix cpu hotplug error handling
Akinobu Mita [Thu, 18 Oct 2007 10:05:16 +0000 (03:05 -0700)]
cpu hotplug: intel_cacheinfo: fix cpu hotplug error handling

- Fix resource leakage in error case within detect_cache_attributes()

- Don't register hotcpu notifier when cache_add_dev() returns error

- Introduce cache_dev_map cpumask to track whether cache interface for
  CPU is successfully added by cache_add_dev() or not.

  cache_add_dev() may fail with out of memory error. In order to
  avoid cache_remove_dev() with that uninitialized cache interface when
  CPU_DEAD event is delivered we need to have the cache_dev_map cpumask.

  (We cannot change cache_add_dev() from CPU_ONLINE event handler
  to CPU_UP_PREPARE event handler. Because cache_add_dev() needs
  to do cpuid and store the results with its CPU online.)

[nix.or.die@googlemail.com: fix a section mismatch warning]
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: mce: fix cpu hotplug error handling
Akinobu Mita [Thu, 18 Oct 2007 10:05:15 +0000 (03:05 -0700)]
cpu hotplug: mce: fix cpu hotplug error handling

- Clear kobject in percpu device_mce before calling sysdev_register() with

  Because mce_create_device() may fail and it leaves kobject filled with
  junk. It will be the problem when mce_create_device() will be called
  next time.

- Fix error handling in mce_create_device()

  Error handling should not do sysdev_remove_file() with not yet added
  attributes.

- Don't register hotcpu notifier when mce_create_device() returns error

- Do mce_create_device() in CPU_UP_PREPARE instead of CPU_ONLINE

Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: msr: fix cpu hotplug error handling
Akinobu Mita [Thu, 18 Oct 2007 10:05:14 +0000 (03:05 -0700)]
cpu hotplug: msr: fix cpu hotplug error handling

Do msr_device_create() in CPU_UP_PREPARE instead of CPU_ONLINE.

Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: thermal_throttle: fix cpu hotplug error handling
Akinobu Mita [Thu, 18 Oct 2007 10:05:13 +0000 (03:05 -0700)]
cpu hotplug: thermal_throttle: fix cpu hotplug error handling

Do thermal_throttle_add_dev() in CPU_UP_PREPARE instead of CPU_ONLINE.

Cc: Dmitriy Zavin <dmitriyz@google.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andi Kleen <ak@suse.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: topology: remove topology_dev_map
Akinobu Mita [Thu, 18 Oct 2007 10:05:12 +0000 (03:05 -0700)]
cpu hotplug: topology: remove topology_dev_map

By previous cpu hotplug notifier change, we don't need to track topology_dev
existence for each cpu by topology_dev_map.

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: cpu: deliver CPU_UP_CANCELED only to NOTIFY_OKed callbacks with CPU_UP_P...
Akinobu Mita [Thu, 18 Oct 2007 10:05:12 +0000 (03:05 -0700)]
cpu hotplug: cpu: deliver CPU_UP_CANCELED only to NOTIFY_OKed callbacks with CPU_UP_PREPARE

The functions in a CPU notifier chain is called with CPU_UP_PREPARE event
before making the CPU online.  If one of the callback returns NOTIFY_BAD, it
stops to deliver CPU_UP_PREPARE event, and CPU online operation is canceled.
Then CPU_UP_CANCELED event is delivered to the functions in a CPU notifier
chain again.

This CPU_UP_CANCELED event is delivered to the functions which have been
called with CPU_UP_PREPARE, not delivered to the functions which haven't been
called with CPU_UP_PREPARE.

The problem that makes existing cpu hotplug error handlings complex is that
the CPU_UP_CANCELED event is delivered to the function that has returned
NOTIFY_BAD, too.

Usually we don't expect to call destructor function against the object that
has failed to initialize.  It is like:

err = register_something();
if (err) {
unregister_something();
return err;
}

So it is natural to deliver CPU_UP_CANCELED event only to the functions that
have returned NOTIFY_OK with CPU_UP_PREPARE event and not to call the function
that have returned NOTIFY_BAD.  This is what this patch is doing.

Otherwise, every cpu hotplug notifiler has to track whether notifiler event is
failed or not for each cpu.  (drivers/base/topology.c is doing this with
topology_dev_map)

Similary this patch makes same thing with CPU_DOWN_PREPARE and CPU_DOWN_FAILED
evnets.

Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: slab: fix memory leak in cpu hotplug error path
Akinobu Mita [Thu, 18 Oct 2007 10:05:11 +0000 (03:05 -0700)]
cpu hotplug: slab: fix memory leak in cpu hotplug error path

This patch fixes memory leak in error path.

In reality, we don't need to call cpuup_canceled(cpu) for now.  But upcoming
cpu hotplug error handling change needs this.

Cc: Christoph Lameter <clameter@sgi.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agocpu hotplug: slab: cleanup cpuup_callback()
Akinobu Mita [Thu, 18 Oct 2007 10:05:09 +0000 (03:05 -0700)]
cpu hotplug: slab: cleanup cpuup_callback()

cpuup_callback() is too long.  This patch factors out CPU_UP_CANCELLED and
CPU_UP_PREPARE handlings from cpuup_callback().

Cc: Christoph Lameter <clameter@sgi.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoupdate checkpatch.pl to version 0.11
Andy Whitcroft [Thu, 18 Oct 2007 10:05:08 +0000 (03:05 -0700)]
update checkpatch.pl to version 0.11

This version brings a more cautious checkpatch.pl by default.  The more
subjective checks are only applied with the --strict option.  It also
brings the usual slew of corrections for false positives.  Of note:

  - new tree detection, the source tree will be found via the executable
  - a major revamp of the unary detection to make it more parser like
  - a new summary at the bottom of the report
  - --strict option for subjective checks
  - --file to enable checking on complete files
  - support for use in emacs "compile" window

Andy Whitcroft (27):
      Version: 0.11
      fix up cat_vet for the case where there are no control characters
      any cast to a pointer introduces a type
      cpp unary operator detection needs to float
      attributes are also valid in type definitions
      sizeof may be a bareword and makes its argument unary
      unary checks for #ifdef et al need to find end of line
      add new --file mode to handle raw source files
      add --strict/--subjective which enables the subjective tests
      add some additional standard type suffixes
      cpp #elif is also a unary prefix
      case is not a function name
      widen asm volatile exceptions
      __kprobes is a type attribute
      typeof is a unary operator
      function open parenthesis checks should check all occurances
      expand sizeof() binary exceptions
      linux/irq.h should not be recommended
      work harder to find the kernel root and add --root=
      fix --emacs mode line numbers and string concatenation warnings
      add a summary to the bottom of the main report
      loosen assignment in if checks
      update operator spacing to maintain tabs in output
      revamp unary detection
      corruption/line wrapped patches need only reporting once
      revamp s/u/be/le 8/16/32/64 bit types
      handle missing ,1 in uni-diff header

Mike D. Day (2):
      Adds support to checkpatch.pl for running in the emacs compile window.
      checkpatch: Fix line number reporting

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoparam_sysfs_builtin memchr argument fix
Dave Young [Thu, 18 Oct 2007 10:05:07 +0000 (03:05 -0700)]
param_sysfs_builtin memchr argument fix

If memchr argument is longer than strlen(kp->name), there will be some
weird result.

It will casuse duplicate filenames in sysfs for the "nousb".  kernel
warning messages are as bellow:

sysfs: duplicate filename 'usbcore' can not be created
WARNING: at fs/sysfs/dir.c:416 sysfs_add_one()
 [<c01c4750>] sysfs_add_one+0xa0/0xe0
 [<c01c4ab8>] create_dir+0x48/0xb0
 [<c01c4b69>] sysfs_create_dir+0x29/0x50
 [<c024e0fb>] create_dir+0x1b/0x50
 [<c024e3b6>] kobject_add+0x46/0x150
 [<c024e2da>] kobject_init+0x3a/0x80
 [<c053b880>] kernel_param_sysfs_setup+0x50/0xb0
 [<c053b9ce>] param_sysfs_builtin+0xee/0x130
 [<c053ba33>] param_sysfs_init+0x23/0x60
 [<c024d062>] __next_cpu+0x12/0x20
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052a856>] do_initcalls+0x46/0x1e0
 [<c01bdb12>] create_proc_entry+0x52/0x90
 [<c0158d4c>] register_irq_proc+0x9c/0xc0
 [<c01bda94>] proc_mkdir_mode+0x34/0x50
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052aa92>] kernel_init+0x62/0xb0
 [<c0104f83>] kernel_thread_helper+0x7/0x14
 =======================
kobject_add failed for usbcore with -EEXIST, don't try to register things with the same name in the same directory.
 [<c024e466>] kobject_add+0xf6/0x150
 [<c053b880>] kernel_param_sysfs_setup+0x50/0xb0
 [<c053b9ce>] param_sysfs_builtin+0xee/0x130
 [<c053ba33>] param_sysfs_init+0x23/0x60
 [<c024d062>] __next_cpu+0x12/0x20
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052a856>] do_initcalls+0x46/0x1e0
 [<c01bdb12>] create_proc_entry+0x52/0x90
 [<c0158d4c>] register_irq_proc+0x9c/0xc0
 [<c01bda94>] proc_mkdir_mode+0x34/0x50
 [<c052aa30>] kernel_init+0x0/0xb0
 [<c052aa92>] kernel_init+0x62/0xb0
 [<c0104f83>] kernel_thread_helper+0x7/0x14
 =======================
Module 'usbcore' failed to be added to sysfs, error number -17
The system will be unstable now.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agostop using DMA_xxBIT_MASK
Andrew Morton [Thu, 18 Oct 2007 10:05:07 +0000 (03:05 -0700)]
stop using DMA_xxBIT_MASK

Now that we have DMA_BIT_MASK(), these macros are pointless.

Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agounify DMA_..BIT_MASK definitions: v3.1
Borislav Petkov [Thu, 18 Oct 2007 10:05:06 +0000 (03:05 -0700)]
unify DMA_..BIT_MASK definitions: v3.1

Remove redundant DMA_..BIT_MASK definitions across two drivers.  The
computation of the majority of the bitmasks is done by the compiler.  The
initial split of the patch touching each a different file got removed due
to possible git bisect breakage.

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Reviewed-by: Satyam Sharma <satyam@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoFix discrepancy between VDSO based gettimeofday() and sys_gettimeofday().
Tony Breeds [Thu, 18 Oct 2007 10:04:57 +0000 (03:04 -0700)]
Fix discrepancy between VDSO based gettimeofday() and sys_gettimeofday().

On platforms that copy sys_tz into the vdso (currently only x86_64, soon to
include powerpc), it is possible for the vdso to get out of sync if a user
calls (admittedly unusual) settimeofday(NULL, ptr).

This patch adds a hook for architectures that set
CONFIG_GENERIC_TIME_VSYSCALL to ensure when sys_tz is updated they can also
updatee their copy in the vdso.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Tony Luck <tony.luck@intel.com>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoRemove struct task_struct::io_wait
Alexey Dobriyan [Thu, 18 Oct 2007 10:04:56 +0000 (03:04 -0700)]
Remove struct task_struct::io_wait

Hell knows what happened in commit 63b05203af57e7de4f3bb63b8b81d43bc196d32b
during 2.6.9 development.  Commit introduced io_wait field which remained
write-only than and still remains write-only.

Also garbage collect macros which "use" io_wait.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Enter platform hibernation state in a consistent way
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:56 +0000 (03:04 -0700)]
Hibernation: Enter platform hibernation state in a consistent way

Make hibernation_platform_enter() execute the enter-a-sleep-state sequence
instead of the mixed shutdown-with-entering-S4 thing.

Replace the shutting down of devices done by kernel_shutdown_prepare(), before
entering the ACPI S4 sleep state, with suspending them and the shutting down
of sysdevs with calling device_power_down(PMSG_SUSPEND) (just like before
entering S1 or S3, but the target state is now S4).   Also, disable the
nonboot CPUs before entering the sleep state (S4), which generally always is a
good idea.

This is known to fix the "double disk spin down during hibernation" on some
machines, eg.  HPC nx6325 (ref.  http://lkml.org/lkml/2007/8/7/316 and the
following thread).   Moreover, it has been reported to make
/sys/class/rtc/rtc0/wakealarm work correctly with hibernation for some users.
It also generally causes the hibernation state (ACPI S4) to be entered faster.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Check if ACPI is enabled during restore in the right place
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:55 +0000 (03:04 -0700)]
Hibernation: Check if ACPI is enabled during restore in the right place

The following scenario leads to total confusion of the platform firmware on
some boxes (eg. HPC nx6325):
* Hibernate with ACPI enabled
* Resume passing "acpi=off" to the boot kernel

To prevent this from happening it's necessary to check if ACPI is enabled (and
enable it if that's not the case) _right_ _after_ control has been transfered
from the boot kernel to the image kernel, before device_power_up() is called
(ie.  with interrupts disabled).   Enabling ACPI after calling
device_power_up() turns out to be insufficient.

For this reason, introduce new hibernation callback ->leave() that will be
executed before device_power_up() by the restored image kernel.   To make it
work, it also is necessary to move swsusp_suspend() from swsusp.c to disk.c
(it's name is changed to "create_image", which is more up to the point).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Use temporary page tables for kernel text mapping on x86_64
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:54 +0000 (03:04 -0700)]
Hibernation: Use temporary page tables for kernel text mapping on x86_64

Use temporary page tables for the kernel text mapping during hibernation
restore on x86_64.

Without the patch, the original boot kernel's page tables that represent the
kernel text mapping are used while the core of the image kernel is being
restored.  However, in principle, if the boot kernel is not identical to the
image kernel, the location of these page tables in the image kernel need not
be the same, so we should create a safe copy of the kernel text mapping prior
to restoring the core of the image kernel.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Pass CR3 in the image header on x86_64
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:54 +0000 (03:04 -0700)]
Hibernation: Pass CR3 in the image header on x86_64

Since we already pass the address of restore_registers() in the image header,
we can also pass the value of the CR3 register from before the hibernation in
the same way.  This will allow us to avoid using init_level4_pgt page tables
during the restore.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Arbitrary boot kernel support on x86_64
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:53 +0000 (03:04 -0700)]
Hibernation: Arbitrary boot kernel support on x86_64

Make it possible to restore a hibernation image on x86_64 with the help of a
kernel different from the one in the image.

The idea is to split the core restoration code into two separate parts and to
place each of them in a different page.   The first part belongs to the boot
kernel and is executed as the last step of the image kernel's memory
restoration procedure.   Before being executed, it is relocated to a safe page
that won't be overwritten while copying the image kernel pages.

The final operation performed by it is a jump to the second part of the core
restoration code that belongs to the image kernel and has just been restored.
This code makes the CPU switch to the image kernel's page tables and restores
the state of general purpose registers (including the stack pointer) from
before the hibernation.

The main issue with this idea is that in order to jump to the second part of
the core restoration code the boot kernel needs to know its address.
 However, this address may be passed to it in the image header.   Namely, the
part of the image header previously used for checking if the version of the
image kernel is correct can be replaced with some architecture specific data
that will allow the boot kernel to jump to the right address within the image
kernel.   These data should also be used for checking if the image kernel is
compatible with the boot kernel (as far as the memory restroration procedure
is concerned).  It can be done, for example, with the help of a "magic" value
that has to be equal in both kernels, so that they can be regarded as
compatible.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoHibernation: Arbitrary boot kernel support - generic code
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:52 +0000 (03:04 -0700)]
Hibernation: Arbitrary boot kernel support - generic code

Add the bits needed for supporting arbitrary boot kernels to the common
hibernation code.

To support arbitrary boot kernels, make it possible to replace the 'struct
new_utsname' and the kernel version in the hibernation image header by some
architecture specific data that will be used to verify if the image is valid
and to restore the image.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agos2ram: kill old debugging junk
Pavel Machek [Thu, 18 Oct 2007 10:04:51 +0000 (03:04 -0700)]
s2ram: kill old debugging junk

This removes old debugging stuff, that should be no longer neccessary.  It
accessed VGA hardware (which may not be ready at this point), and used LEDs
at port 80 for debugging.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoserial: turn serial console suspend a boot rather than compile time option
Andres Salomon [Thu, 18 Oct 2007 10:04:50 +0000 (03:04 -0700)]
serial: turn serial console suspend a boot rather than compile time option

Currently, there's a CONFIG_DISABLE_CONSOLE_SUSPEND that allows one to stop
the serial console from being suspended when the rest of the machine goes
to sleep.  This is incredibly useful for debugging power management-related
things; however, having it as a compile-time option has proved to be
incredibly inconvenient for us (OLPC).  There are plenty of times that we
want serial console to not suspend, but for the most part we'd like serial
console to be suspended.

This drops CONFIG_DISABLE_CONSOLE_SUSPEND, and replaces it with a kernel
boot parameter (no_console_suspend).  By default, the serial console will
be suspended along with the rest of the system; by passing
'no_console_suspend' to the kernel during boot, serial console will remain
alive during suspend.

For now, this is pretty serial console specific; further fixes could be
applied to make this work for things like netconsole.

Signed-off-by: Andres Salomon <dilinger@debian.org>
Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@suspend2.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: measure freezing time
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:49 +0000 (03:04 -0700)]
freezer: measure freezing time

Measure the time of the freezing of tasks, even if it doesn't fail.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: be more verbose
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:48 +0000 (03:04 -0700)]
freezer: be more verbose

Increase the freezer's verbosity a bit, so that it's easier to read problem
reports related to it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agopm_trace displays the wrong time from the RTC
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:48 +0000 (03:04 -0700)]
pm_trace displays the wrong time from the RTC

The way in which read_magic_time() displays the date read from the RTC is
apparently confusing to the users (cf.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=250238).  Make it
print dates in the standard way.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agounexport pm_power_off_prepare
Adrian Bunk [Thu, 18 Oct 2007 10:04:47 +0000 (03:04 -0700)]
unexport pm_power_off_prepare

This patch removes the unused EXPORT_SYMBOL(pm_power_off_prepare).

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: do not send signals to kernel threads
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:46 +0000 (03:04 -0700)]
freezer: do not send signals to kernel threads

The freezer should not send signals to kernel threads, since that may lead to
subtle problems.  In particular, commit
b74d0deb968e1f85942f17080eace015ce3c332c has changed recalc_sigpending_tsk()
so that it doesn't clear TIF_SIGPENDING.  For this reason, if the freezer
continues to send fake signals to kernel threads and the freezing of kernel
threads fails, some of them may be running with TIF_SIGPENDING set forever.

Accordingly, recalc_sigpending_tsk() shouldn't set the task's TIF_SIGPENDING
flag if TIF_FREEZE is set.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: introduce freezer-friendly waiting macros
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:45 +0000 (03:04 -0700)]
freezer: introduce freezer-friendly waiting macros

Introduce freezer-friendly wrappers around wait_event_interruptible() and
wait_event_interruptible_timeout(), originally defined in <linux/wait.h>, to
be used in freezable kernel threads.  Make some of the freezable kernel
threads use them.

This is necessary for the freezer to stop sending signals to kernel threads,
which is implemented in the next patch.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: prevent new tasks from inheriting TIF_FREEZE set
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:45 +0000 (03:04 -0700)]
freezer: prevent new tasks from inheriting TIF_FREEZE set

Tasks should go to the refrigerator only if explicitly requested to do that by
the freezer and not as a result of inheriting the TIF_FREEZE flag set from the
parent.  Make it happen.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: do not sync filesystems from freeze_processes
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:44 +0000 (03:04 -0700)]
freezer: do not sync filesystems from freeze_processes

The syncing of filesystems from within the freezer is generally not needed.
Also, if there's an ext3 filesystem loopback-mounted from a FUSE one, the
syncing results in writes to it and deadlocks.  Similarly, it will deadlock if
FUSE implements sync.

Change freeze_processes() so that it doesn't execute sys_sync() and make the
suspend and hibernation code path sync filesystems independently of the
freezer.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofreezer: document relationship with memory shrinking
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:43 +0000 (03:04 -0700)]
freezer: document relationship with memory shrinking

One important reason to freeze tasks, which is that we don't want them to
allocate memory after freeing it for the hibernation image, has not been
documented.  Fix it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Rename hibernation_ops to platform_hibernation_ops
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:43 +0000 (03:04 -0700)]
PM: Rename hibernation_ops to platform_hibernation_ops

Rename 'struct hibernation_ops' to 'struct platform_hibernation_ops' in
analogy with 'struct platform_suspend_ops'.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Rework struct hibernation_ops
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:42 +0000 (03:04 -0700)]
PM: Rework struct hibernation_ops

During hibernation we also need to tell the ACPI core that we're going to put
the system into the S4 sleep state.  For this reason, an additional method in
'struct hibernation_ops' is needed, playing the role of set_target() in
'struct platform_suspend_operations'.  Moreover, the role of the .prepare()
method is now different, so it's better to introduce another method, that in
general may be different from .prepare(), that will be used to prepare the
platform for creating the hibernation image (.prepare() is used anyway to
notify the platform that we're going to enter the low power state after the
image has been saved).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Make suspend_ops static
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:41 +0000 (03:04 -0700)]
PM: Make suspend_ops static

The variable suspend_ops representing the set of global platform-specific
suspend-related operations, used by the PM core, need not be exported outside
of kernel/power/main.c .   Make it static.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Rework struct platform_suspend_ops
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:41 +0000 (03:04 -0700)]
PM: Rework struct platform_suspend_ops

There is no reason why the .prepare() and .finish() methods in 'struct
platform_suspend_ops' should take any arguments, since architectures don't use
these methods' argument in any practically meaningful way (ie.  either the
target system sleep state is conveyed to the platform by .set_target(), or
there is only one suspend state supported and it is indicated to the PM core
by .valid(), or .prepare() and .finish() aren't defined at all).   There also
is no reason why .finish() should return any result.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Rename struct pm_ops and related things
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:40 +0000 (03:04 -0700)]
PM: Rename struct pm_ops and related things

The name of 'struct pm_ops' suggests that it is related to the power
management in general, but in fact it is only related to suspend.   Moreover,
its name should indicate what this structure is used for, so it seems
reasonable to change it to 'struct platform_suspend_ops'.   In that case, the
name of the global variable of this type used by the PM core and the names of
related functions should be changed accordingly.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoPM: Move definition of struct pm_ops to suspend.h
Rafael J. Wysocki [Thu, 18 Oct 2007 10:04:39 +0000 (03:04 -0700)]
PM: Move definition of struct pm_ops to suspend.h

Move the definition of 'struct pm_ops' and related functions from <linux/pm.h>
to <linux/suspend.h> .

There are, at least, the following reasons to do that:
* 'struct pm_ops' is specifically related to suspend and not to the power
  management in general.
* As long as 'struct pm_ops' is defined in <linux/pm.h>, any modification of it
  causes the entire kernel to be recompiled, which is unnecessary and annoying.
* Some suspend-related features are already defined in <linux/suspend.h>, so it
  is logical to move the definition of 'struct pm_ops' into there.
* 'struct hibernation_ops', being the hibernation-related counterpart of
  'struct pm_ops', is defined in <linux/suspend.h> .

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agomake kernel/power/main.c:suspend_enter() static
Adrian Bunk [Thu, 18 Oct 2007 10:04:37 +0000 (03:04 -0700)]
make kernel/power/main.c:suspend_enter() static

suspend_enter() can now become static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agologo.c: get rid of mips_machgroup
Ralf Baechle [Thu, 18 Oct 2007 10:04:37 +0000 (03:04 -0700)]
logo.c: get rid of mips_machgroup

This has not been any serious user of this ill conceived thing since the
original invention in like '95 so I recently deleted this from everywhere
except the last instance in logo.c.  This patch removes the last two
instances in logo.c.  They conditions were not useful anyway as when
compiled in they would always evaluate as true.

Last not least this is necessary to get the SGI IP22 and DECstation kernels
to compile again.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agofb modedb: Refactor confusing mode_option assignment
Geert Uytterhoeven [Thu, 18 Oct 2007 10:04:36 +0000 (03:04 -0700)]
fb modedb: Refactor confusing mode_option assignment

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agotty_ioctl: fix the baud_table check in encode_baud_rate
Maciej W. Rozycki [Thu, 18 Oct 2007 10:04:35 +0000 (03:04 -0700)]
tty_ioctl: fix the baud_table check in encode_baud_rate

The tty_termios_encode_baud_rate() function as defined by tty_ioctl.c has a
problem with the baud_table within.  The comparison operators are reversed
and as a result this table's entries never match and BOTHER is always used.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoRemove CONFIG_VT_UNICODE
Jan Engelhardt [Thu, 18 Oct 2007 10:04:34 +0000 (03:04 -0700)]
Remove CONFIG_VT_UNICODE

Since default_utf8 is already a sysfs attribute, having an extra
CONFIG_VT_UNICODE compile-time option is redundant, since sysfs attributes can
be set at boot and run time.

Also let Linux VCs default to UTF-8 (as per the discussion at
http://lkml.org/lkml/2007/9/6/99).

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Cc: Bill Nottingham <notting@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoKexec: Update URL in MAINTAINERS file
Signed-off-by@vergenet.net":Simon [Thu, 18 Oct 2007 10:04:33 +0000 (03:04 -0700)]
Kexec: Update URL in MAINTAINERS file

I'm not sure that the new URL satifies the requirement of status/info, but
it does at least as good a job as the old URL, and contains current
releases of kexec-tools, rather than somewhat ancient versions.

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoi4l: Fix random hard freeze with AVM c4 card
Karsten Keil [Thu, 18 Oct 2007 10:04:32 +0000 (03:04 -0700)]
i4l: Fix random hard freeze with AVM c4 card

The patch
- Includes the call to capilib_data_b3_req in the spinlock. This routine
  in turn calls the offending mq_enqueue routine that triggered the
  freeze if not locked.  This should also fix other indicators of
  incosistent capilib_msgidqueue list, that trigger messages like:
  Oct  5 03:05:57 BERL0 kernel: kcapi: msgid 3019 ncci 0x30301 not on queue
  that we saw several times a day (usually several in a row).
- Fixes all occurrences of c4_dispatch_tx to be called with active
  spinlock, there were some instances where no lock was active. Mostly
  these are in very infrequently called routines, so the additional
  performance penalty is minimal.

Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Rainer Brestan <rainer.brestan@frequentis.com>
Signed-off-by: Ralf Schlatterbeck <rsc@runtux.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoi4l: fix random freezes with AVM B1 drivers
Karsten Keil [Thu, 18 Oct 2007 10:04:31 +0000 (03:04 -0700)]
i4l: fix random freezes with AVM B1 drivers

This fix the same issue which was debbuged for the C4 controller for the B1
versions.

The capilib_ function modify or traverse a linked list without locking.

This patch extends the existing locking to the calls of these function to
prevent access to a list which is in the middle of a modification.

Signed-off-by: Karsten Keil <kkeil@suse.de>
C: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoau1100fb: fix modpost warnings
Ralf Baechle [Thu, 18 Oct 2007 10:04:30 +0000 (03:04 -0700)]
au1100fb: fix modpost warnings

  MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x170be8): Section mismatch: reference to .init.data:au1100fb_fix (between 'au1100fb_drv_probe' and 'read_null')
WARNING: vmlinux.o(.text+0x170dc4): Section mismatch: reference to .init.data:au1100fb_var (between 'au1100fb_drv_probe' and 'read_null')
WARNING: vmlinux.o(.text+0x170dd0): Section mismatch: reference to .init.data:au1100fb_fix (between 'au1100fb_drv_probe' and 'read_null')
WARNING: vmlinux.o(.text+0x170de0): Section mismatch: reference to .init.data:au1100fb_var (between 'au1100fb_drv_probe' and 'read_null')
WARNING: vmlinux.o(.text+0x170e70): Section mismatch: reference to .init.data:au1100fb_var (between 'au1100fb_drv_probe' and 'read_null')

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agonetport_con.c: fix build errors and warnings
Ralf Baechle [Thu, 18 Oct 2007 10:04:29 +0000 (03:04 -0700)]
netport_con.c: fix build errors and warnings

Fix build broken by accaa24c492f1aa3b9c37226d868dc59c3007531:

  CC      drivers/video/console/newport_con.o
drivers/video/console/newport_con.c: In function 'newport_show_logo':
drivers/video/console/newport_con.c:111: error: assignment of read-only location
drivers/video/console/newport_con.c:111: warning: assignment makes integer from pointer without a cast
drivers/video/console/newport_con.c:112: error: assignment of read-only location
drivers/video/console/newport_con.c:112: warning: assignment makes integer from pointer without a cast

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
17 years agoext4: lighten up resize transaction requirements
Eric Sandeen [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: lighten up resize transaction requirements

When resizing online, setup_new_group_blocks attempts to reserve a
potentially very large transaction, depending on the current filesystem
geometry.  For some journal sizes, there may not be enough room for this
transaction, and the online resize will fail.

The patch below resizes & restarts the transaction as necessary while
setting up the new group, and should work with even the smallest journal.

Tested with something like:

[root@newbox ~]# dd if=/dev/zero of=fsfile bs=1024 count=32768
[root@newbox ~]# mkfs.ext3 -b 1024 fsfile 16384
[root@newbox ~]# mount -o loop fsfile mnt/
[root@newbox ~]# resize2fs /dev/loop0
resize2fs 1.40.2 (12-Jul-2007)
Filesystem at /dev/loop0 is mounted on /root/mnt; on-line resizing required
old desc_blocks = 1, new_desc_blocks = 1
Performing an on-line resize of /dev/loop0 to 32768 (1k) blocks.
resize2fs: No space left on device While trying to add group #2
[root@newbox ~]# dmesg | tail -n 1
JBD: resize2fs wants too many credits (258 > 256)
[root@newbox ~]#

With the below change, it works.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Acked-by: Andreas Dilger <adilger@clusterfs.com>
17 years agoext4: fix setup_new_group_blocks locking
Eric Sandeen [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: fix setup_new_group_blocks locking

setup_new_group_blocks() manipulates the group descriptor block bh
under the block_bitmap bh's lock.  It shouldn't matter since nobody
but resize should be touching these blocks, but it's worth fixing up.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoext4: sparse fixes
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: sparse fixes

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: Convert ext4_extent_idx.ei_leaf to ext4_extent_idx.ei_leaf_lo
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert ext4_extent_idx.ei_leaf to ext4_extent_idx.ei_leaf_lo

Convert ext4_extent_idx.ei_leaf  ext4_extent_idx.ei_leaf_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: Convert ext4_extent.ee_start to ext4_extent.ee_start_lo
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert ext4_extent.ee_start to ext4_extent.ee_start_lo

Convert ext4_extent.ee_start to ext4_extent.ee_start_lo
This helps in finding BUGs due to direct partial access of
these split 48 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: Convert s_r_blocks_count and s_free_blocks_count
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert s_r_blocks_count and s_free_blocks_count

Convert s_r_blocks_count and s_free_blocks_count to
s_r_blocks_count_lo and s_free_blocks_count_lo

This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
17 years agoext4: Convert s_blocks_count to s_blocks_count_lo
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert s_blocks_count to s_blocks_count_lo

Convert s_blocks_count to s_blocks_count_lo
This helps in finding BUGs due to direct partial access of
these split 64 bit values

Also fix direct partial access in ext4 code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: Convert bg_inode_bitmap and bg_inode_table
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert bg_inode_bitmap and bg_inode_table

Convert bg_inode_bitmap and bg_inode_table to bg_inode_bitmap_lo
and bg_inode_table_lo.  This helps in finding BUGs due to
direct partial access of these split 64 bit values

Also fix one direct partial access

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: Convert bg_block_bitmap to bg_block_bitmap_lo
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Convert bg_block_bitmap to bg_block_bitmap_lo

Convert bg_block_bitmap to bg_block_bitmap_lo
This helps in catching some BUGS due to direct
partial access of these split fields.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: FLEX_BG Kernel support v2.
Jose R. Santos [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: FLEX_BG Kernel support v2.

This feature relaxes check restrictions on where each block groups meta
data is located within the storage media.  This allows for the allocation
of bitmaps or inode tables outside the block group boundaries in cases
where bad blocks forces us to look for new blocks which the owning block
group can not satisfy.  This will also allow for new meta-data allocation
schemes to improve performance and scalability.

Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
17 years agoext4: Fix sparse warnings
Aneesh Kumar K.V [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Fix sparse warnings

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
17 years agoExt4: Uninitialized Block Groups
Andreas Dilger [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
Ext4: Uninitialized Block Groups

In pass1 of e2fsck, every inode table in the fileystem is scanned and checked,
regardless of whether it is in use.  This is this the most time consuming part
of the filesystem check.  The unintialized block group feature can greatly
reduce e2fsck time by eliminating checking of uninitialized inodes.

With this feature, there is a a high water mark of used inodes for each block
group.  Block and inode bitmaps can be uninitialized on disk via a flag in the
group descriptor to avoid reading or scanning them at e2fsck time.  A checksum
of each group descriptor is used to ensure that corruption in the group
descriptor's bit flags does not cause incorrect operation.

The feature is enabled through a mkfs option

mke2fs /dev/ -O uninit_groups

A patch adding support for uninitialized block groups to e2fsprogs tools has
been posted to the linux-ext4 mailing list.

The patches have been stress tested with fsstress and fsx.  In performance
tests testing e2fsck time, we have seen that e2fsck time on ext3 grows
linearly with the total number of inodes in the filesytem.  In ext4 with the
uninitialized block groups feature, the e2fsck time is constant, based
solely on the number of used inodes rather than the total inode count.
Since typical ext4 filesystems only use 1-10% of their inodes, this feature can
greatly reduce e2fsck time for users.  With performance improvement of 2-20
times, depending on how full the filesystem is.

The attached graph shows the major improvements in e2fsck times in filesystems
with a large total inode count, but few inodes in use.

In each group descriptor if we have

EXT4_BG_INODE_UNINIT set in bg_flags:
        Inode table is not initialized/used in this group. So we can skip
        the consistency check during fsck.
EXT4_BG_BLOCK_UNINIT set in bg_flags:
        No block in the group is used. So we can skip the block bitmap
        verification for this group.

We also add two new fields to group descriptor as a part of
uninitialized group patch.

        __le16  bg_itable_unused;       /* Unused inodes count */
        __le16  bg_checksum;            /* crc16(sb_uuid+group+desc) */

bg_itable_unused:

If we have EXT4_BG_INODE_UNINIT not set in bg_flags
then bg_itable_unused will give the offset within
the inode table till the inodes are used. This can be
used by fsck to skip list of inodes that are marked unused.

bg_checksum:
Now that we depend on bg_flags and bg_itable_unused to determine
the block and inode usage, we need to make sure group descriptor
is not corrupt. We add checksum to group descriptor to
detect corruption. If the descriptor is found to be corrupt, we
mark all the blocks and inodes in the group used.

Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
17 years agoext4: remove #ifdef CONFIG_EXT4_INDEX
Eric Sandeen [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: remove #ifdef CONFIG_EXT4_INDEX

CONFIG_EXT4_INDEX is not an exposed config option in the kernel, and it is
unconditionally defined in ext4_fs.h.  tune2fs is already able to turn off
dir indexing, so at this point it's just cluttering up the code.  Remove
it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
17 years agoext4: Remove (partial, never completed) fragment support
Coly Li [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
ext4: Remove (partial, never completed) fragment support

Fragment support in ext2/3/4 was never implemented, and it probably will
never be implemented.   So remove it from ext4.

Signed-off-by: Coly Li <coyli@suse.de>
Acked-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
17 years agoJBD2: debug code cleanup.
Jose R. Santos [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD2: debug code cleanup.

Mostly stolen from akpm's JBD cleanup patch.

- use `#ifdef foo' instead of `#if defined(foo)'

- Make journal_enable_debug __read_mostly just for the heck of it

- Make jbd_debugfs_dir and jbd_debug static

- debugfs_remove(NULL) is legal: remove unneeded tests

- remove unnecessary empty loops

Signed-off-by: Jose R. Santos <jrs@us.ibm.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
17 years agojbd2: fix commit code to properly abort journal
Jan Kara [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
jbd2: fix commit code to properly abort journal

We should really call journal_abort() and not __journal_abort_hard() in
case of errors.  The latter call does not record the error in the journal
superblock and thus filesystem won't be marked as with errors later (and
user could happily mount it without any warning).

Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
17 years agojbd2: JBD_XXX to JBD2_XXX naming cleanup
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
jbd2: JBD_XXX to JBD2_XXX naming cleanup

change JBD_XXX macros to JBD2_XXX in JBD2/Ext4

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
17 years agoJBD2/Ext4: Convert kmalloc to kzalloc in jbd2/ext4
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD2/Ext4: Convert kmalloc to kzalloc in jbd2/ext4

Convert kmalloc to kzalloc() and get rid of the memset().

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoJBD2: replace jbd_kmalloc with kmalloc directly.
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD2: replace jbd_kmalloc with kmalloc directly.

This patch cleans up jbd_kmalloc and replace it with kmalloc directly

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoJBD: replace jbd_kmalloc with kmalloc directly
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD: replace jbd_kmalloc with kmalloc directly

This patch cleans up jbd_kmalloc and replace it with kmalloc directly

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoJBD2: jbd2 slab allocation cleanups
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD2: jbd2 slab allocation cleanups

JBD2: Replace slab allocations with page allocations

JBD2 allocate memory for committed_data and frozen_data from slab. However
JBD2 should not pass slab pages down to the block layer. Use page allocator
pages instead. This will also prepare JBD for the large blocksize patchset.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoJBD: JBD slab allocation cleanups
Mingming Cao [Tue, 16 Oct 2007 22:38:25 +0000 (18:38 -0400)]
JBD: JBD slab allocation cleanups

JBD: Replace slab allocations with page allocations

JBD allocate memory for committed_data and frozen_data from slab. However
JBD should not pass slab pages down to the block layer. Use page allocator pages instead. This will also prepare JBD for the large blocksize patchset.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
17 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
Linus Torvalds [Wed, 17 Oct 2007 22:13:42 +0000 (15:13 -0700)]
Merge branch 'release' of git://git./linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] fix non-numa build

17 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh...
Linus Torvalds [Wed, 17 Oct 2007 22:05:58 +0000 (15:05 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ericvh/v9fs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: remove sysctl
  9p: fix bad kconfig cross-dependency
  9p: soften invalidation in loose_mode
  9p: attach-per-user
  9p: rename uid and gid parameters
  9p: define session flags
  9p: Make transports dynamic

17 years ago[IA64] fix non-numa build
Andrew Morton [Wed, 17 Oct 2007 21:28:38 +0000 (14:28 -0700)]
[IA64] fix non-numa build

arch/ia64/kernel/machine_kexec.c: In function `arch_crash_save_vmcoreinfo':
arch/ia64/kernel/machine_kexec.c:131: error: `pgdat_list' undeclared (first use in this function)
arch/ia64/kernel/machine_kexec.c:131: error: (Each undeclared identifier is reported only once
arch/ia64/kernel/machine_kexec.c:131: error: for each function it appears in.)
arch/ia64/kernel/machine_kexec.c:134: error: `node_memblk' undeclared (first use in this function)
arch/ia64/kernel/machine_kexec.c:135: error: `NR_NODE_MEMBLKS' undeclared (first use in this function)
arch/ia64/kernel/machine_kexec.c:136: error: invalid application of `sizeof' to incomplete type `node_memblk_s'
arch/ia64/kernel/machine_kexec.c:137: error: dereferencing pointer to incomplete type
arch/ia64/kernel/machine_kexec.c:138: error: dereferencing pointer to incomplete type
make[1]: *** [arch/ia64/kernel/machine_kexec.o] Error 1

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
17 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
Linus Torvalds [Wed, 17 Oct 2007 21:12:44 +0000 (14:12 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/drzeus/mmc

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  net: libertas sdio driver
  mmc: at91_mci: cleanup: use MCI_ERRORS
  mmc: possible leak in mmc_read_ext_csd

17 years agonet: libertas sdio driver
Pierre Ossman [Wed, 17 Oct 2007 20:24:24 +0000 (22:24 +0200)]
net: libertas sdio driver

Add driver for Marvell's Libertas 8385 and 8686 wifi chips.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Acked-by: Dan Williams <dcbw@redhat.com>
17 years agoMerge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86
Linus Torvalds [Wed, 17 Oct 2007 20:13:16 +0000 (13:13 -0700)]
Merge ssh:///linux/kernel/git/tglx/linux-2.6-x86

* ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86: (114 commits)
  x86: delete vsyscall files during make clean
  kbuild: fix typo SRCARCH in find_sources
  x86: fix kernel rebuild due to vsyscall fallout
  .gitignore update for x86 arch
  x86: unify include/asm/debugreg_32/64.h
  x86: unify include/asm/unwind_32/64.h
  x86: unify include/asm/types_32/64.h
  x86: unify include/asm/tlb_32/64.h
  x86: unify include/asm/siginfo_32/64.h
  x86: unify include/asm/bug_32/64.h
  x86: unify include/asm/mman_32/64.h
  x86: unify include/asm/agp_32/64.h
  x86: unify include/asm/kdebug_32/64.h
  x86: unify include/asm/ioctls_32/64.h
  x86: unify include/asm/floppy_32/64.h
  x86: apply missing DMA/OOM prevention to floppy_32.h
  x86: unify include/asm/cache_32/64.h
  x86: unify include/asm/cache_32/64.h
  x86: unify include/asm/dmi_32/64.h
  x86: unify include/asm/delay_32/64.h
  ...

17 years agox86: delete vsyscall files during make clean
Sam Ravnborg [Wed, 17 Oct 2007 20:06:30 +0000 (22:06 +0200)]
x86: delete vsyscall files during make clean

make clean failed to delete a few files in
x86/kernel. This is because kbuild does not
see the correct/full kernel/Makefile.

As a workaround until the Makefiles are merged specify
the files to be deleted in the common Makefile.

Reported by Mike Galbraith <efault@gmx.de>

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agokbuild: fix typo SRCARCH in find_sources
Yinghai Lu [Tue, 16 Oct 2007 07:28:06 +0000 (00:28 -0700)]
kbuild: fix typo SRCARCH in find_sources

otherwise get the two copy file list in SRCARCH

for cscope:
C symbol: start_kernel

  File           Function            Line
0 proto.h        <global>              11 extern void start_kernel(void );
1 start_kernel.h <global>              10 extern asmlinkage void __init start_kernel(void );
2 head32.c       i386_start_kernel     37 start_kernel();
3 head32.c       i386_start_kernel     37 start_kernel();
4 head64.c       x86_64_start_kernel   85 start_kernel();
5 head64.c       x86_64_start_kernel   85 start_kernel();
6 head_32.S      options              199 cmpb $0,%cl #the first CPU calls start_kernel
7 head_32.S      options              199 cmpb $0,%cl #the first CPU calls start_kernel
8 enlighten.c    xen_start_kernel    1145 start_kernel();
9 enlighten.c    xen_start_kernel    1145 start_kernel();
a lguest.c       lguest_init         1095 start_kernel();
b main.c         start_kernel         513 asmlinkage void __init start_kernel(void )

after the patch:
C symbol: start_kernel

  File           Function            Line
0 proto.h        <global>              11 extern void start_kernel(void );
1 start_kernel.h <global>              10 extern asmlinkage void __init start_kernel(void );
2 head32.c       i386_start_kernel     37 start_kernel();
3 head64.c       x86_64_start_kernel   85 start_kernel();
4 head_32.S      options              199 cmpb $0,%cl #the first CPU calls start_kernel
5 enlighten.c    xen_start_kernel    1145 start_kernel();
6 lguest.c       lguest_init         1095 start_kernel();
7 main.c         start_kernel         513 asmlinkage void __init start_kernel(void )

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years ago9p: remove sysctl
Eric Van Hensbergen [Wed, 17 Oct 2007 19:35:15 +0000 (14:35 -0500)]
9p: remove sysctl

A sysctl method was added to enable and disable debugging levels.  After
further review, it was decided that there are better approaches to doing this
and the sysctl methodology isn't really desirable.  This patch removes the
sysctl code from 9p.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years agommc: at91_mci: cleanup: use MCI_ERRORS
Andrew Victor [Wed, 17 Oct 2007 09:53:40 +0000 (11:53 +0200)]
mmc: at91_mci: cleanup: use MCI_ERRORS

A small MMC driver cleanup.

Use the defined AT91_MCI_ERRORS in at91_mci_completed_command() instead
of specifying all the error bits individually.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
17 years agommc: possible leak in mmc_read_ext_csd
Florin Malita [Sat, 13 Oct 2007 16:27:20 +0000 (12:27 -0400)]
mmc: possible leak in mmc_read_ext_csd

The exception path associated with an invalid ext_csd_struct returns
without freeing ext_csd.

Coverity CID 1909.

Signed-off-by: Florin Malita
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
17 years ago9p: fix bad kconfig cross-dependency
Eric Van Hensbergen [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: fix bad kconfig cross-dependency

This patch moves transport dynamic registration and matching to the net
module to prevent a bad Kconfig dependency between the net and fs 9p modules.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years ago9p: soften invalidation in loose_mode
Eric Van Hensbergen [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: soften invalidation in loose_mode

Loose mode in 9p utilizes the page cache without respecting coherency with
the server.  Any writes previously invaldiated the entire mapping for a file.
This patch softens the behavior to only invalidate the region of the actual
write.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years ago9p: attach-per-user
Latchesar Ionkov [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: attach-per-user

The 9P2000 protocol requires the authentication and permission checks to be
done in the file server. For that reason every user that accesses the file
server tree has to authenticate and attach to the server separately.
Multiple users can share the same connection to the server.

Currently v9fs does a single attach and executes all I/O operations as a
single user. This makes using v9fs in multiuser environment unsafe as it
depends on the client doing the permission checking.

This patch improves the 9P2000 support by allowing every user to attach
separately. The patch defines three modes of access (new mount option
'access'):

- attach-per-user (access=user) (default mode for 9P2000.u)
 If a user tries to access a file served by v9fs for the first time, v9fs
 sends an attach command to the server (Tattach) specifying the user. If
 the attach succeeds, the user can access the v9fs tree.
 As there is no uname->uid (string->integer) mapping yet, this mode works
 only with the 9P2000.u dialect.

- allow only one user to access the tree (access=<uid>)
 Only the user with uid can access the v9fs tree. Other users that attempt
 to access it will get EPERM error.

- do all operations as a single user (access=any) (default for 9P2000)
 V9fs does a single attach and all operations are done as a single user.
 If this mode is selected, the v9fs behavior is identical with the current
 one.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years ago9p: rename uid and gid parameters
Latchesar Ionkov [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: rename uid and gid parameters

Change the names of 'uid' and 'gid' parameters to the more appropriate
'dfltuid' and 'dfltgid'.  This also sets the default uid/gid to -2
(aka nfsnobody)

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years ago9p: define session flags
Latchesar Ionkov [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: define session flags

Create more general flags field in the v9fs_session_info struct and move the
'extended' flag as a bit in the flags.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years ago9p: Make transports dynamic
Eric Van Hensbergen [Wed, 17 Oct 2007 19:31:07 +0000 (14:31 -0500)]
9p: Make transports dynamic

This patch abstracts out the interfaces to underlying transports so that
new transports can be added as modules.  This should also allow kernel
configuration of transports without ifdef-hell.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
17 years agox86: fix kernel rebuild due to vsyscall fallout
Sam Ravnborg [Wed, 17 Oct 2007 19:16:33 +0000 (21:16 +0200)]
x86: fix kernel rebuild due to vsyscall fallout

Fix rebuild of kernel when there is no changes.
This happened for i386.
Using make V=2 hinted that the output files were
not assigned to targets - fixed by this patch.

Reported by: Boaz Harrosh <bharrosh@panasas.com>

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years ago.gitignore update for x86 arch
Denis V. Lunev [Tue, 16 Oct 2007 07:22:21 +0000 (11:22 +0400)]
.gitignore update for x86 arch

This patch:
- makes .gitignore files visible to git
- makes arch/x86/kernel/vsyscall_32.lds and arch/i386/boot invisible

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agoMerge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
Linus Torvalds [Wed, 17 Oct 2007 18:56:06 +0000 (11:56 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
  [BLOCK] blk_rq_map_sg() next_sg fixup
  Revert "[SCSI] Remove full sg table memset()"

17 years agox86: unify include/asm/debugreg_32/64.h
Thomas Gleixner [Wed, 17 Oct 2007 18:35:37 +0000 (20:35 +0200)]
x86: unify include/asm/debugreg_32/64.h

Almost identical except for the extra DR_LEN_8 and the different
DR_CONTROL_RESERVED defines.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Conflicts:

include/asm-x86/Kbuild

17 years agox86: unify include/asm/unwind_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:21 +0000 (23:28 +0200)]
x86: unify include/asm/unwind_32/64.h

32bit has an extra UNW_FP define, which does not hurt.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/types_32/64.h
Thomas Gleixner [Wed, 17 Oct 2007 18:32:07 +0000 (20:32 +0200)]
x86: unify include/asm/types_32/64.h

Mostly the same. Make the few exceptions conditional.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Conflicts:

include/asm-x86/types_32.h

17 years agox86: unify include/asm/tlb_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:21 +0000 (23:28 +0200)]
x86: unify include/asm/tlb_32/64.h

Same file, except for whitespace, comment formatting.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/siginfo_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:21 +0000 (23:28 +0200)]
x86: unify include/asm/siginfo_32/64.h

Same file, except for the 64bit PREAMBLE_SIZE define.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/bug_32/64.h
Thomas Gleixner [Wed, 17 Oct 2007 15:19:30 +0000 (17:19 +0200)]
x86: unify include/asm/bug_32/64.h

Same file, except for whitespace, comment formatting and the
.long/.quad delta which can be solved by a define.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/mman_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:21 +0000 (23:28 +0200)]
x86: unify include/asm/mman_32/64.h

Same file, except for the extra 64bit MAP_32BIT define, which does not hurt
for 32 bit compiles.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/agp_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:20 +0000 (23:28 +0200)]
x86: unify include/asm/agp_32/64.h

The 32bit D(n) debug addon can be made exclusive for 32 bit compiles.
Otherwise all the same.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/kdebug_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:20 +0000 (23:28 +0200)]
x86: unify include/asm/kdebug_32/64.h

The 64 bit variant has additional function prototypes which do no harm
for 32 bit.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
17 years agox86: unify include/asm/ioctls_32/64.h
Thomas Gleixner [Mon, 15 Oct 2007 21:28:20 +0000 (23:28 +0200)]
x86: unify include/asm/ioctls_32/64.h

Same file, except for whitespace and comment formatting.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>