tty: Fix double grabbing of a spinlock

The HSO changes for kref introduced a recursive spinlock take. All
functions which call put_rxbuf_data already have serial->serial_lock
grabbed.

[Comment to code added-AC]

Signed-off-by: Denis Joseph Barrow <D.Barrow@option.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tty: Fix a kref leak in the HSO driver on re-open

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

ftdi_sio: fix kref leak

Commit 4a90f09b20f4622dcbff1f0e1e6bae1704f8ad8c added kref stuff to
ftdi_sio, but missed tty_kref_put at one exit point in
ftdi_process_read.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When a break signal is detected, the next character should be ignored.

This was not implemented correctly for the pnx8xxx_uart driver.

[From further discussion:
Correct, you can look to it as two separate bugs:
a) the next character is not ignored while it should;
b) the status bits 31-8 are copied to the 'ch' variable while they shouldn't.

Both bugs prevent correct break signal handling (and therefore correct
behaviour of the magic SysRq key). Bug b didn't cause too much trouble
earlier because in most situations the status bits are all zero; for
this case they unfortunately aren't.
]

Signed-off-by: Mischa Jonker <mischa.jonker@nxp.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

serial: Add SupraExpress 336i PnP Voice Modem

Add SupraExpress 336i PnP Voice Modem

Tested and working with the following device: (output from lspnp -v)
01:01.00 SUP1381 (unknown)
    state = active
io 0x2f8-0x2ff
irq 3

Signed-off-by: Daniel Gagnon <daniel.gagnon@yahoo.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8250_pci: add support for netmos 9835 IBM devices

Most of netmos 9835 hardware is handled by parport-serial.  IBM introduces
a device which doesn't have any parallel ports and have screwed subdevice
PCI id (not corresponding to port numbers).

Handle this device (9710:9835 1014:0299) properly.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tty: Fix race in the flush for some ldiscs

If you issue an ioctl to flush a tty as the line discipline is changing or
otherwise unplugged you can get a crash. The bug is very old but the rest
of the BKL lock dropping and some very "good" luck on Ingo's part caught
an example.

Use the correct ldisc_ref form so that we wait for the ldisc change to
complete and then flush

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (29 commits)
  powerpc/83xx: Move mcu_mpc8349emitx driver out of drivers/i2c/chips/
  powerpc/83xx: Make serial ports work on MPC8315E-RDB w/ FSL U-Boots
  powerpc/e500mc: Doorbells need to be taken w/exceptions disabled
  powerpc: Enable PS3 options and QPACE in ppc64_defconfig
  powerpc/powermac: Fix occasional SMP boot failure
  powerpc/cacheinfo: Rename cache_dir per-cpu variable
  hvc_console: Use kzalloc() instead of kmalloc() + memset()
  hvc_console: Do not set low_latency when using interrupts
  hvc_console: Call free_irq() only if request_irq() was successful
  hvc_console: Change an mb() to smp_mb() and add some comments
  powerpc: Cleanup from l64 to ll64 change: drivers/net
  powerpc: Cleanup from l64 to ll64 change: drivers/char
  powerpc: Cleanup from l64 to ll64 change: arch code
  powerpc: Change u64/s64 to a long long integer type
  powerpc/kexec: Check crash_base for relocatable kernel
  powerpc: Make dummy section a valid note header
  Xilinx: SPI: updated driver for device tree
  drivers/of: Add the of_find_i2c_device_by_node function.
  powerpc/xsysace: add compatible string for non-ipcore instance
  powerpc/mpc52xx: remove dead code from GPIO driver
  ...

Merge branch 'syscalls' of git://git390.osdl.marist.edu/linux-2.6

* 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (44 commits)
  [CVE-2009-0029] s390 specific system call wrappers
  [CVE-2009-0029] System call wrappers part 33
  [CVE-2009-0029] System call wrappers part 32
  [CVE-2009-0029] System call wrappers part 31
  [CVE-2009-0029] System call wrappers part 30
  [CVE-2009-0029] System call wrappers part 29
  [CVE-2009-0029] System call wrappers part 28
  [CVE-2009-0029] System call wrappers part 27
  [CVE-2009-0029] System call wrappers part 26
  [CVE-2009-0029] System call wrappers part 25
  [CVE-2009-0029] System call wrappers part 24
  [CVE-2009-0029] System call wrappers part 23
  [CVE-2009-0029] System call wrappers part 22
  [CVE-2009-0029] System call wrappers part 21
  [CVE-2009-0029] System call wrappers part 20
  [CVE-2009-0029] System call wrappers part 19
  [CVE-2009-0029] System call wrappers part 18
  [CVE-2009-0029] System call wrappers part 17
  [CVE-2009-0029] System call wrappers part 16
  [CVE-2009-0029] System call wrappers part 15
  ...

byteorder: make swab.h include asm/swab.h like a regular header

Add swab.h to kbuild.asm and remove the individual entries from
each arch, mark as unifdef as some arches have some kernel-only
bits inside.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

cris: introduce asm/swab.h

Adjust the arch overrides to the new names as well.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  [XFS] Update maintainers
  [XFS] use scalable vmap API
  [XFS] remove old vmap cache
  [XFS] make xfs_ino_t an unsigned long long
  [XFS] truncate readdir offsets to signed 32 bit values
  [XFS] fix compile of xfs_btree_readahead_lblock on m68k
  [XFS] Remove macro-to-function indirections in the mask code
  [XFS] Remove macro-to-function indirections in attr code
  [XFS] Remove several unused typedefs.
  [XFS] pass XFS_IGET_BULKSTAT to xfs_iget for handle operations

Merge git://git./linux/kernel/git/bart/ide-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
  IDE: fix sparse signed-ness errors with host->host_busy
  ide: fix suspend regression
  tx4938ide: Fix build error due to read_sff_dma_status moving
  ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
  sl82c105: remove dead code
  via82cxxx: fix cable warning message
  ide: can't use SSD/non-rotational queue flag for all CFA devices
  it821x.c: use dev->revision instead of pci_read_config_byte
  it821x: Add ultra_mask quirk for Vortex86SX
  ide: fix accidental LOCKDEP breakage caused by local_irq_set() removal

IDE: fix sparse signed-ness errors with host->host_busy

The host_busy field in struct ide_host defaults to a
signed-long, where most arch's test_and_set_bit_*
macros use an unsigned long.

Change to using an unsigned long, which on ARM removes
the following sparse errors:

drivers/ide/ide-io.c:681:8: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:681:8:    expected unsigned long volatile *p
drivers/ide/ide-io.c:681:8:    got long volatile *<noident>
drivers/ide/ide-io.c:681:8: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:681:8:    expected unsigned long volatile *p
drivers/ide/ide-io.c:681:8:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>
drivers/ide/ide-io.c:695:3: warning: incorrect type in argument 2 (different signedness)
drivers/ide/ide-io.c:695:3:    expected unsigned long volatile *p
drivers/ide/ide-io.c:695:3:    got long volatile *<noident>

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide: fix suspend regression

On Monday 12 January 2009, Simon Holm Thøgersen wrote:
> commit 295f000 ("ide: don't execute the next queued command from the
> hard-IRQ context (v2)") breaks suspend to disk for me. On
> 'echo disk > /sys/power/state' the systems hangs, letting me switch
> virtual consoles, but not responding to Alt+SysRq

Restart the request queue early for REQ_TYPE_PM_RESUME requests
(though there is only one resume request for the whole resume
sequence it stays in the queue until is fully completed and now
depends on kblockd for processing consequential resume states).

Reported-and-bisected-by: Simon Holm Thøgersen <odie@cs.aau.dk>
Tested-by: Simon Holm Thøgersen <odie@cs.aau.dk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

tx4938ide: Fix build error due to read_sff_dma_status moving

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

sl82c105: remove dead code

CONFIG_LOPEC and CONFIG_SANDPOINT config options are gone.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

via82cxxx: fix cable warning message

Remove reference to the removed old-style kernel parameter.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide: can't use SSD/non-rotational queue flag for all CFA devices

Some rotating disks also present themselves as CFA devices.

Reported-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

it821x.c: use dev->revision instead of pci_read_config_byte

Minor cleanup.

Signed-off-by: Brandon Philips <bphilips@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Shawn Lin <shawn@dmp.com.tw>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

it821x: Add ultra_mask quirk for Vortex86SX

On Vortex86SX with IDE controller revision 0x11 ultra DMA must be
disabled. This patch was tested by DMP and seems to work.

It is a cleaned up version of their older Kernel patch:
 http://www.dmp.com.tw/tech/vortex86sx/patch-2.6.24-DMP.gz

Tested-by: Shawn Lin <shawn@dmp.com.tw>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide: fix accidental LOCKDEP breakage caused by local_irq_set() removal

commit 54cc1428cfa619e16d75baae8cb041a2eff015f0 ("ide: remove
local_irq_set() macro") accidentally replaced local_save_flags()
by local_irq_set() in ide_probe_port() and __ide_wait_stat()
which resulted in LOCKDEP breakage.

Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

kernel/up.c: omit it if SMP=y, USE_GENERIC_SMP_HELPERS=n

Fix the sparc build - we were including `up.o' on SMP builds, when
CONFIG_USE_GENERIC_SMP_HELPERS=n.

Tested-by: Robert Reif <reif@earthlink.net>
Fixed-by: Robert Reif <reif@earthlink.net>
Cc: David Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: fix assertion

This assertion is incorrect for lockless pagecache.  By definition if we
have an unpinned page that we are trying to take a speculative reference
to, it may become the tail of a compound page at any time (if it is
freed, then reallocated as a compound page).

It was still a valid assertion for the vmscan.c LRU isolation case, but
it doesn't seem incredibly helpful...  if somebody wants it, they can
put it back directly where it applies in the vmscan code.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

[CVE-2009-0029] s390 specific system call wrappers

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 33

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 32

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 31

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 30

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 29

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 28

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 27

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 26

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 25

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 24

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 23

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 22

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 21

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 20

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 19

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 18

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 17

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 16

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 15

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 14

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 13

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 12

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 11

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 10

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 09

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 08

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 07

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 06

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 05

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 04

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 03

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 02

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrappers part 01

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrapper special cases

System calls with an unsigned long long argument can't be converted with
the standard wrappers since that would include a cast to long, which in
turn means that we would lose the upper 32 bit on 32 bit architectures.
Also semctl can't use the standard wrapper since it has a 'union'
parameter.

So we handle them as special case and add some extra wrappers instead.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] s390: enable system call wrappers

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] powerpc: Enable syscall wrappers for 64-bit

This enables the use of syscall wrappers to do proper sign extension
for 64-bit programs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] System call wrapper infrastructure

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

By selecting HAVE_SYSCALL_WRAPPERS architectures can activate
system call wrappers in order to sign extend system call arguments.

All architectures where the ABI defines that the caller of a function
has to perform sign extension probably need this.

Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Make sys_syslog a conditional system call

Remove the -ENOSYS implementation for !CONFIG_PRINTK and use
the cond_syscall infrastructure instead.

Acked-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Make sys_pselect7 static

Not a single architecture has wired up sys_pselect7 plus it is the
only system call with seven parameters. Just make it static and
rename it to do_pselect which will do the work for sys_pselect6.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2

Remove __attribute__((weak)) from common code sys_pipe implemantation.
IA64, ALPHA, SUPERH (32bit) and SPARC (32bit) have own implemantations
with the same name. Just rename them.
For sys_pipe2 there is no architecture specific implementation.

Cc: Richard Henderson <rth@twiddle.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Rename old_readdir to sys_old_readdir

This way it matches the generic system call name convention.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Convert all system calls to return a long

Convert all system calls to return a long. This should be a NOP since all
converted types should have the same size anyway.
With the exception of sys_exit_group which returned void. But that doesn't
matter since the system call doesn't return.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

[CVE-2009-0029] Move compat system call declarations to compat header file

Move declarations to correct header file.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

Merge git://git./linux/kernel/git/torvalds/linux-2.6 into for-linus

powerpc/83xx: Move mcu_mpc8349emitx driver out of drivers/i2c/chips/

This patch is used to help Jean Delvare to get rid of drivers/i2c/chips/
directory. The new location suggested by Kumar Gala: as the driver is
83xx specific it's placed into arch/powerpc/platforms/83xx/.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

powerpc/83xx: Make serial ports work on MPC8315E-RDB w/ FSL U-Boots

FSL U-Boots use /soc8315@e0000000 node to search and fixup serial
nodes' clock-frequency properties. Though in upstream kernels we use
new naming convention -- for IMMR address space dts files specify
/immr@e0000000 nodes.

This makes FSL U-Boots fail to fixup the clock frequencies, and that
leads to serial ports misbehaviour. We can workaround the issue by
filling the clock frequency values manually.

p.s. For the same reason FSL U-Boots fail to fixup MAC addresses for
ethernet nodes, so users should either change the .dts file locally
or set MAC address via `ifconfig hw ether' command.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

powerpc/e500mc: Doorbells need to be taken w/exceptions disabled

We use Doorbell interrupts for IPIs and thus we need to make sure we aren't
interrupted in the process of processing the IPI.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Dave Liu <daveliu@freescale.com>

Merge branch 'x86-pat-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86 PAT: remove CPA WARN_ON for zero pte
  x86 PAT: return compatible mapping to remap_pfn_range callers
  x86 PAT: change track_pfn_vma_new to take pgprot_t pointer param
  x86 PAT: consolidate old memtype new memtype check into a function
  x86 PAT: remove PFNMAP type on track_pfn_vma_new() error

Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm:
  TWL4030: fix clk API usage
  [ARM] 5364/1: allow flush_ioremap_region() to be used from modules
  [ARM] w90x900: fix build errors and warnings
  [ARM] i.MX add missing include
  [ARM] i.MX: fix breakage from commit 278892736e99330195c8ae5861bcd9d791bbf19e
  [ARM] i.MX: remove LCDC controller register definitions from imx-regs.h

Fix timeouts in sys_pselect7

Since we (Analog Devices) updated our Blackfin kernel to 2.6.28, we've
seen occasional 5-second hangs from telnet.  telnetd calls select with a
NULL timeout, but with the new kernel, the system call occasionally
returns 0, which causes telnet to call sleep (5).  This did not happen
with earlier kernels.

The code in sys_pselect7 looks a bit strange, in particular the variable
"to" is initialized to NULL, then changed if a non-null timeout was
passed in, but not used further.  It needs to be passed to
core_sys_select instead of &end_time.

This bug was introduced by 8ff3e8e85fa6c312051134b3953e397feb639f51
("select: switch select() and poll() over to hrtimers").

Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Reviewed-by: Ulrich Drepper <drepper@redhat.com>
Tested-by: Robin Getz <rgetz@blackfin.uclinux.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fix early_serial_setup() regression

Commit b430428a188e8a434325e251d0704af4b88b4711 ("8250: Don't clobber
spinlocks.") introduced a regression on the parisc architecture, which
broke the handover to the serial port at boottime.

early_serial_setup() was changed to only copy a subset of the uart_port
fields, and sadly the "type" and "line" fields were forgotten and thus
the serial port was not initialized and could not be used for a
handover.  This patch fixes this by copying the missing fields.

As this change to early_serial_setup() doesn't need an initialized
spinlock in the uart_port struct any longer, we can drop the spinlock
initialization in the superio driver.

Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

TWL4030: fix clk API usage

Always pass a struct device if one is available; and there's really
no reason for the processor specific stuff in this file if only
people would follow the API usage properly by using the struct device.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

x86 PAT: remove CPA WARN_ON for zero pte

Impact: reduce scope of debug check - avoid warnings

The logic to find whether identity map exists or not using
high_memory or max_low_pfn_mapped/max_pfn_mapped are not complete
as the memory withing the range may not be mapped if there is a
unusable hole in e820.

Specifically, on my test system I started seeing these warnings with
tools like hwinfo, acpidump trying to map ACPI region.

[   27.400018] ------------[ cut here ]------------
[   27.400344] WARNING: at /home/venkip/src/linus/linux-2.6/arch/x86/mm/pageattr.c:560 __change_page_attr_set_clr+0xf3/0x8b8()
[   27.400821] Hardware name: X7DB8
[   27.401070] CPA: called for zero pte. vaddr = ffff8800cff6a000 cpa->vaddr = ffff8800cff6a000
[   27.401569] Modules linked in:
[   27.401882] Pid: 4913, comm: dmidecode Not tainted 2.6.28-05716-gfe0bdec #586
[   27.402141] Call Trace:
[   27.402488]  [<ffffffff80237c21>] warn_slowpath+0xd3/0x10f
[   27.402749]  [<ffffffff80274ade>] ? find_get_page+0xb3/0xc9
[   27.403028]  [<ffffffff80274a2b>] ? find_get_page+0x0/0xc9
[   27.403333]  [<ffffffff80226425>] __change_page_attr_set_clr+0xf3/0x8b8
[   27.403628]  [<ffffffff8028ec99>] ? __purge_vmap_area_lazy+0x192/0x1a1
[   27.403883]  [<ffffffff8028eb52>] ? __purge_vmap_area_lazy+0x4b/0x1a1
[   27.404172]  [<ffffffff80290268>] ? vm_unmap_aliases+0x1ab/0x1bb
[   27.404512]  [<ffffffff80290105>] ? vm_unmap_aliases+0x48/0x1bb
[   27.404766]  [<ffffffff80226d28>] change_page_attr_set_clr+0x13e/0x2e6
[   27.405026]  [<ffffffff80698fa7>] ? _spin_unlock+0x26/0x2a
[   27.405292]  [<ffffffff80227e6a>] ? reserve_memtype+0x19b/0x4e3
[   27.405590]  [<ffffffff80226ffd>] _set_memory_wb+0x22/0x24
[   27.405844]  [<ffffffff80225d28>] ioremap_change_attr+0x26/0x28
[   27.406097]  [<ffffffff80228355>] reserve_pfn_range+0x1a3/0x235
[   27.406427]  [<ffffffff80228430>] track_pfn_vma_new+0x49/0xb3
[   27.406686]  [<ffffffff80286c46>] remap_pfn_range+0x94/0x32c
[   27.406940]  [<ffffffff8022878d>] ? phys_mem_access_prot_allowed+0xb5/0x1a8
[   27.407209]  [<ffffffff803e9bf4>] mmap_mem+0x75/0x9d
[   27.407523]  [<ffffffff8028b3b4>] mmap_region+0x2cf/0x53e
[   27.407776]  [<ffffffff8028b8cc>] do_mmap_pgoff+0x2a9/0x30d
[   27.408034]  [<ffffffff8020f4a4>] sys_mmap+0x92/0xce
[   27.408339]  [<ffffffff8020b65b>] system_call_fastpath+0x16/0x1b
[   27.408614] ---[ end trace 4b16ad70c09a602d ]---
[   27.408871] dmidecode:4913 reserve_pfn_range ioremap_change_attr failed write-back for cff6a000-cff6b000

This is wih track_pfn_vma_new trying to keep identity map in sync.
The address cff6a000 is the ACPI region according to e820.

[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  BIOS-e820: 0000000000000000 - 000000000009c000 (usable)
[    0.000000]  BIOS-e820: 000000000009c000 - 00000000000a0000 (reserved)
[    0.000000]  BIOS-e820: 00000000000cc000 - 00000000000d0000 (reserved)
[    0.000000]  BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved)
[    0.000000]  BIOS-e820: 0000000000100000 - 00000000cff60000 (usable)
[    0.000000]  BIOS-e820: 00000000cff60000 - 00000000cff69000 (ACPI data)
[    0.000000]  BIOS-e820: 00000000cff69000 - 00000000cff80000 (ACPI NVS)
[    0.000000]  BIOS-e820: 00000000cff80000 - 00000000d0000000 (reserved)
[    0.000000]  BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
[    0.000000]  BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
[    0.000000]  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
[    0.000000]  BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)
[    0.000000]  BIOS-e820: 0000000100000000 - 0000000230000000 (usable)

And is not mapped as per init_memory_mapping.

[    0.000000] init_memory_mapping: 0000000000000000-00000000cff60000
[    0.000000] init_memory_mapping: 0000000100000000-0000000230000000

We can add logic to check for this. But, there can also be other holes in
identity map when we have 1GB of aligned reserved space in e820.

This patch handles it by removing the WARN_ON and returning a specific
error value (EFAULT) to indicate that the address does not have any
identity mapping.

The code that tries to keep identity map in sync can ignore
this error, with other callers of cpa still getting error here.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86 PAT: return compatible mapping to remap_pfn_range callers

Impact: avoid warning message, potentially solve 3D performance regression

Change x86 PAT code to return compatible memtype if the exact memtype that
was requested in remap_pfn_rage and friends is not available due to some
conflict.

This is done by returning the compatible type in pgprot parameter of
track_pfn_vma_new(), and the caller uses that memtype for page table.

Note that track_pfn_vma_copy() which is basically called during fork gets the
prot from existing page table and should not have any conflict. Hence we use
strict memtype check there and do not allow compatible memtypes.

This patch fixes the bug reported here:

  http://marc.info/?l=linux-kernel&m=123108883716357&w=2

Specifically the error message:

  X:5010 map pfn expected mapping type write-back for d0000000-d0101000,
  got write-combining

Should go away.

Reported-and-bisected-by: Kevin Winchester <kjwinchester@gmail.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86 PAT: change track_pfn_vma_new to take pgprot_t pointer param

Impact: cleanup

Change the protection parameter for track_pfn_vma_new() into a pgprot_t pointer.
Subsequent patch changes the x86 PAT handling to return a compatible
memtype in pgprot_t, if what was requested cannot be allowed due to conflicts.
No fuctionality change in this patch.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86 PAT: consolidate old memtype new memtype check into a function

Impact: cleanup

Move the new memtype old memtype allowed check to header so that is can be
shared by other users. Subsequent patch uses this in pat.c in remap_pfn_range()
code path. No functionality change in this patch.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86 PAT: remove PFNMAP type on track_pfn_vma_new() error

Impact: fix (harmless) double-free of memtype entries and avoid warning

On track_pfn_vma_new() failure, reset the vm_flags so that there will be
no second cleanup happening when upper level routines call unmap_vmas().

This patch fixes part of the bug reported here:

  http://marc.info/?l=linux-kernel&m=123108883716357&w=2

Specifically the error message:

  X:5010 freeing invalid memtype d0000000-d0101000

Is due to multiple frees on error path, will not happen with the patch below.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  Revert "i386: add TRACE_IRQS_OFF for the nmi"

Merge branch 'core-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  smp_call_function_single(): be slightly less stupid, fix #2
  lockdep, mm: fix might_fault() annotation

Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/iser: Add dependency on INFINIBAND_ADDR_TRANS
  IPoIB: Do not join broadcast group if interface is brought down
  RDMA/nes: Fix for NIPQUAD removal
  IPoIB: Fix loss of connectivity after bonding failover on both sides
  IB/mlx4: Don't register IB device for adapters with no IB ports
  mlx4_core: Fix warning from min()
  IB/ehca: spin_lock_irqsave() takes an unsigned long

Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  pata_it821x: Update RDC UDMA handling
  ata: fix wrong WARN_ON_ONCE

Prevent oops at boot with VT-d

With some broken BIOSs when VT-d is enabled, the data structures are
filled incorrectly. This can cause a NULL pointer dereference in very
early boot.

Signed-off-by: Dirk Hohndel <hohndel@linux.intel.com>
Acked-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

pata_it821x: Update RDC UDMA handling

The UDMA affliction is apparently specific to revision 0x11. Keeps us in sync
with drivers/ide current.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

ata: fix wrong WARN_ON_ONCE

This patch fixes a wrong WARN_ON that was triggered by 32bit PIO support:
WARNING: at drivers/ata/libata-sff.c:1017 ata_sff_hsm_move+0x45e/0x750()

__atapi_pio_bytes simply doesnt know enough to decide if there is a bug.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

powerpc: Enable PS3 options and QPACE in ppc64_defconfig

To increase the amount of code that's built for a defconfig build.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc/powermac: Fix occasional SMP boot failure

The PowerMac kernel occasionally fails to bring up the secondary CPUs on
SMP, the trigger factor seem to be fairly random and related to location
of code and data.

This appears to be due to the initial loading of the TOC value by the
secondary processor which now happens before we clear HID4:RM_CI (Real
Mode Cache Invalidate). This bit should really be cleared before we do
any load or store other than fetching code.

This fix works based on the assumption that all SMP 64-bit PowerMacs use
variants of the 970, which fortunately is true, by explicitely clearing
that bit, adding an slbia for good measure as RM_CI mode is known to
create bogus ERAT entries.

I also removed some spurrious debug output that was left enabled by
mistake while at it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc/cacheinfo: Rename cache_dir per-cpu variable

The per_cpu__ prefix on DECLARE_PER_CPU'd variables is going away;
rename cache_dir to cache_dir_pcpu.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

hvc_console: Use kzalloc() instead of kmalloc() + memset()

Replace kmalloc() + memset()  with kzalloc().

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

hvc_console: Do not set low_latency when using interrupts

hvc_console is setting low_latency unconditionally, but some clients are
interrupt driven and will call hvc_poll from irq context.  This will cause
tty_flip_buffer_push to be called from irq context, and it very clearly
states it must not be called from IRQ when low_latency is specified.

Looking back through history:
v2.6.16-rc1 via 33f0f88f1c51ae5c2d593d26960c760ea154c2e2
    [PATCH] TTY layer buffering revamp

added this new api.

v2.6.16-rc3 via 8977d929e49021d9a6e031310aab01fa72f849c2
    [PATCH] tty buffering stall fix

claims to fix a stall discovered with hvc_console

v2.6.16-rc5 via fb5c594c2acc441f0d2d8f457484a0e0e9285db3
   [PATCH] Fix race condition in hvc console.

said set this flag to avoid a stall problem, and was merged through
the powerpc arch tree.

Without searching for email discussions, it would appear to be an
overlapping "fix", but one that did not consider all users.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

hvc_console: Call free_irq() only if request_irq() was successful

Only call free_irq if we marked the request_irq has having succeeded
instead of whenever the the sub-driver identified the interrupt to use.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

hvc_console: Change an mb() to smp_mb() and add some comments

I remember some history on this barrier.  There was a race between
open via /dev/console and the tty being fully setup.  Its also why
there is a temporary variable and the global is assigned at the end
of the function.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc: Cleanup from l64 to ll64 change: drivers/net

These are powerpc specific drivers.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc: Cleanup from l64 to ll64 change: drivers/char

This is a powerpc specific driver.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

powerpc: Cleanup from l64 to ll64 change: arch code

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>