GitHub/moto-9609/android_kernel_motorola_exynos9610.git
12 years agopowerpc/ptrace: Enable hardware breakpoint upon re-registering
Aravinda Prasad [Sun, 4 Nov 2012 22:15:28 +0000 (22:15 +0000)]
powerpc/ptrace: Enable hardware breakpoint upon re-registering

On powerpc, ptrace will disable hardware breakpoint request once the
breakpoint is hit. It is the responsibility of the caller to set it
again. However, when the caller sets the hardware breakpoint again
using ptrace(PTRACE_SET_DEBUGREG, child_pid, 0, addr), the hardware
breakpoint is not enabled.

While gdb's approach is to unregister and re-register the hardware
breakpoint every time the breakpoint is hit - which is working fine,
this could affect other programs trying to re-register hardware
breakpoint without unregistering.

This patch enables hardware breakpoint if the caller is re-registering.

Signed-off-by: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Use asm-generic/bitops/le.h
Akinobu Mita [Sun, 4 Nov 2012 02:03:45 +0000 (02:03 +0000)]
powerpc: Use asm-generic/bitops/le.h

The only difference between powerpc and asm-generic le-bitops is
test_bit_le().  Usually all bitops require a long aligned bitmap.
But powerpc test_bit_le() can take an unaligned address.

There is no special callsite of test_bit_le() that needs unaligned
access in powerpc as far as I can see.  So convert to use
asm-generic/bitops/le.h for powerpc.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Remove BITOP_MASK and BITOP_WORD from asm/bitops.h
Akinobu Mita [Sun, 4 Nov 2012 02:03:44 +0000 (02:03 +0000)]
powerpc: Remove BITOP_MASK and BITOP_WORD from asm/bitops.h

Replace BITOP_MASK and BITOP_WORD with BIT_MASK and BIT_WORD defined
in linux/bitops.h and remove BITOP_* which are not used anymore.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/iommu: Use bitmap library
Akinobu Mita [Sun, 4 Nov 2012 02:03:43 +0000 (02:03 +0000)]
powerpc/iommu: Use bitmap library

- Caluculate the bitmap size with BITS_TO_LONGS()
 - Use bitmap_empty() to verify that all bits are cleared

This also includes a printk to pr_warn() conversion.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/perf: Use uapi/unistd.h to fix build error
Sukadev Bhattiprolu [Wed, 31 Oct 2012 18:21:28 +0000 (11:21 -0700)]
powerpc/perf: Use uapi/unistd.h to fix build error

Use the 'unistd.h' from arch/powerpc/include/uapi to build the perf tool.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Fix typos in Freescale copyright claims
Yang Li [Thu, 1 Nov 2012 18:53:42 +0000 (18:53 +0000)]
powerpc: Fix typos in Freescale copyright claims

There are many cases that Semiconductor is misspelled.  The patch
fix these typos.

Signed-off-by: Li Yang <leoli@freescale.com>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Remove stale function prototypes from setup.h
Anton Blanchard [Thu, 1 Nov 2012 14:55:55 +0000 (14:55 +0000)]
powerpc: Remove stale function prototypes from setup.h

I noticed a couple of function prototypes for functions that
no longer exist. Remove them.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Move most of setup.h out of uapi
Anton Blanchard [Thu, 1 Nov 2012 14:55:04 +0000 (14:55 +0000)]
powerpc: Move most of setup.h out of uapi

Most of setup.h should not be exported to userspace, so move it
back. All we are left with is the asm-generic include to pick
up the COMMAND_LINE_SIZE define.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Fix denorm symbol name
Michael Neuling [Wed, 31 Oct 2012 18:58:36 +0000 (18:58 +0000)]
powerpc: Fix denorm symbol name

Fix global symbol name to match actual denorm_exception_hv label.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: POWER8 cputable entry
Michael Neuling [Tue, 30 Oct 2012 19:34:15 +0000 (19:34 +0000)]
powerpc: POWER8 cputable entry

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Add POWER8 setup code
Michael Neuling [Tue, 30 Oct 2012 19:34:14 +0000 (19:34 +0000)]
powerpc: Add POWER8 setup code

Just a copy of POWER7 for now.  Will update with new code later.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: make POWER7 setup code name generic
Michael Neuling [Tue, 30 Oct 2012 19:34:13 +0000 (19:34 +0000)]
powerpc: make POWER7 setup code name generic

We are going to reuse this in POWER8 so make the name generic.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/perf: Add missing L2 constraint handling in Power7 PMU
Michael Ellerman [Tue, 30 Oct 2012 16:09:56 +0000 (16:09 +0000)]
powerpc/perf: Add missing L2 constraint handling in Power7 PMU

If we have two cache events that require different settings of the L2SEL
bits in MMCR1 then we can not schedule those events simultaneously. Add
logic to the constraint handling to express that.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/powermac/cpufreq_32: Set non-infinite transition time for 7447A driver
Andreas Schwab [Sun, 28 Oct 2012 23:15:14 +0000 (23:15 +0000)]
powerpc/powermac/cpufreq_32: Set non-infinite transition time for 7447A driver

The transition time for the 7447A is around 8ms which makes it possible
to use the ondemand governor.  This has been tested on the iBook G4
(PowerBook6,7).

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Tested-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/ptrace: Remove unused addr parameter in ppc_del_hwdebug()
Michael Neuling [Sun, 28 Oct 2012 15:13:17 +0000 (15:13 +0000)]
powerpc/ptrace: Remove unused addr parameter in ppc_del_hwdebug()

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/ptrace: Fix spelling mistake
Michael Neuling [Sun, 28 Oct 2012 15:13:16 +0000 (15:13 +0000)]
powerpc/ptrace: Fix spelling mistake

s/intruction/instruction/

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/hw-breakpoint: Use generic hw-breakpoint interfaces for new PPC ptrace flags
K.Prasad [Sun, 28 Oct 2012 15:13:15 +0000 (15:13 +0000)]
powerpc/hw-breakpoint: Use generic hw-breakpoint interfaces for new PPC ptrace flags

PPC_PTRACE_GETHWDBGINFO, PPC_PTRACE_SETHWDEBUG and PPC_PTRACE_DELHWDEBUG are
PowerPC specific ptrace flags that use the watchpoint register. While they are
targeted primarily towards BookE users, user-space applications such as GDB
have started using them for BookS too. This patch enables the use of generic
hardware breakpoint interfaces for these new flags.

Apart from the usual benefits of using generic hw-breakpoint interfaces, these
changes allow debuggers (such as GDB) to use a common set of ptrace flags for
their watchpoint needs and allow more precise breakpoint specification (length
of the variable can be specified).

Mikey added: rebased and added dbginfo.features around #ifdef
             CONFIG_HAVE_HW_BREAKPOINT

Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Remove no longer used ppc_md.idle_loop()
Michael Ellerman [Wed, 24 Oct 2012 17:21:09 +0000 (17:21 +0000)]
powerpc: Remove no longer used ppc_md.idle_loop()

The last user of ppc_md.idle_loop() was removed when we dropped the
legacy iSeries code, in commit 8ee3e0d.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning !
Li Zhong [Mon, 22 Oct 2012 23:46:27 +0000 (23:46 +0000)]
powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning !

This patch tries to fix the following BUG report:

[    0.012313] BUG: MAX_STACK_TRACE_ENTRIES too low!
[    0.012318] turning off the locking correctness validator.
[    0.012321] Call Trace:
[    0.012330] [c00000017666f6d0] [c000000000012128] .show_stack+0x78/0x184 (unreliable)
[    0.012339] [c00000017666f780] [c0000000000b6348] .save_trace+0x12c/0x14c
[    0.012345] [c00000017666f800] [c0000000000b7448] .mark_lock+0x2bc/0x710
[    0.012351] [c00000017666f8b0] [c0000000000bb198] .__lock_acquire+0x748/0xaec
[    0.012357] [c00000017666f9b0] [c0000000000bb684] .lock_acquire+0x148/0x194
[    0.012365] [c00000017666fa80] [c00000000069371c] .mutex_lock_nested+0x84/0x4ec
[    0.012372] [c00000017666fb90] [c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c
[    0.012380] [c00000017666fc30] [c0000000009ba910] .spawn_ksoftirqd+0x28/0x48
[    0.012386] [c00000017666fcb0] [c00000000000a98c] .do_one_initcall+0xd8/0x1d0
[    0.012392] [c00000017666fd60] [c00000000000b1f8] .kernel_init+0x120/0x398

[    0.012398] [c00000017666fe30] [c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64
[    0.012404] [c00000017666fa00] [c00000017666fb20] 0xc00000017666fb20
[    0.012410] [c00000017666fa80] [c00000000069371c] .mutex_lock_nested+0x84/0x4ec
[    0.012416] [c00000017666fb90] [c000000000096998] .smpboot_register_percpu_thread+0x3c/0x10c
[    0.012422] [c00000017666fc30] [c0000000009ba910] .spawn_ksoftirqd+0x28/0x48
[    0.012427] [c00000017666fcb0] [c00000000000a98c] .do_one_initcall+0xd8/0x1d0
[    0.012433] [c00000017666fd60] [c00000000000b1f8] .kernel_init+0x120/0x398

[    0.012439] [c00000017666fe30] [c000000000009ad4] .ret_from_kernel_thread+0x5c/0x64
.......

The reason is that the back chain of c00000017666fe30
(ret_from_kernel_thread) contains some invalid value, which might form a
loop.

Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/powernv: Fix OPAL debug entry
Benjamin Herrenschmidt [Sun, 21 Oct 2012 14:30:52 +0000 (14:30 +0000)]
powerpc/powernv: Fix OPAL debug entry

OPAL provides the firmware base/entry in registers at boot time
for debugging purposes. We had a bug in the code trying to stash
these into the appropriate kernel globals (a line of code was
probably dropped by accident back when this was merged)

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/rtas_flash: Eliminate possible double free
Julia Lawall [Sun, 21 Oct 2012 00:52:05 +0000 (00:52 +0000)]
powerpc/rtas_flash: Eliminate possible double free

The function initialize_flash_pde_data is only called four times.  All four
calls are in the function rtas_flash_init, and on the failure of any of the
calls, remove_flash_pde is called on the third argument of each of the
calls.  There is thus no need for initialize_flash_pde_data to call
remove_flash_pde on the same argument.  remove_flash_pde kfrees the data
field of its argument, and does not clear that field, so this amounts ot a
possible double free.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f,free,a;
parameter list[n] ps;
type T;
expression e;
@@

f(ps,T a,...) {
  ... when any
      when != a = e
  if(...) { ... free(a); ... return ...; }
  ... when any
}

@@
identifier r.f,r.free;
expression x,a;
expression list[r.n] xs;
@@

* x = f(xs,a,...);
  if (...) { ... free(a); ... return ...; }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/pnv: Avoid bogus output
Gavin Shan [Wed, 17 Oct 2012 19:53:30 +0000 (19:53 +0000)]
powerpc/pnv: Avoid bogus output

There're couples of functions defined to print debugging messages
during initializing P7IOC. However, we got bogus output from those
functions like pe_info(). The problem here is that the message
level (the first parameter to printk()) isn't printable and that
caused the bogus output.

The patch fixes the issue by merging __pe_printk() to the macro
define_pe_printk_level() so that we can pass the message level
directly to printk().

Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/sysdev: Use module_platform_driver macro
Srinivas Kandagatla [Wed, 10 Oct 2012 08:32:30 +0000 (08:32 +0000)]
powerpc/sysdev: Use module_platform_driver macro

This patch removes some code duplication by using
module_platform_driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Fallback to printk() in xmon_printf() if udbg is not setup
Michael Ellerman [Tue, 9 Oct 2012 04:20:47 +0000 (04:20 +0000)]
powerpc/xmon: Fallback to printk() in xmon_printf() if udbg is not setup

It is possible to configure a kernel which has xmon enabled, but has no
udbg backend to provide IO. This can make xmon rather confusing, as it
produces no output, blocks for two seconds, and then returns.

As a last resort we can instead try to printk(), which may deadlock or
otherwise crash, but tries quite hard not to.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Fiddle xmon_depth_to_print logic in xmon_show_stack()
Michael Ellerman [Tue, 9 Oct 2012 04:20:36 +0000 (04:20 +0000)]
powerpc/xmon: Fiddle xmon_depth_to_print logic in xmon_show_stack()

Currently xmon_depth_to_print is static and global, but it's only
ever used in xmon_show_stack().

At least with a modern compiler it's inlined, so there's no point
in it being static, we could #define it but it's only used in one
place.

By reworking the logic we can drop count and just decrement the
max value as a loop counter. Also switch to a while loop so we
actually print no more than 64 frames as you'd expect based on the
variable name.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Use STACK_FRAME_OVERHEAD in xmon_show_stack()
Michael Ellerman [Tue, 9 Oct 2012 04:20:35 +0000 (04:20 +0000)]
powerpc/xmon: Use STACK_FRAME_OVERHEAD in xmon_show_stack()

We use STACK_FRAME_OVERHEAD in the exception vectors to establish
the exception frame, so it should be good enough to use here.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Remove unused #defines
Michael Ellerman [Tue, 9 Oct 2012 04:20:34 +0000 (04:20 +0000)]
powerpc/xmon: Remove unused #defines

Neither REGS_PER_LINE or LAST_VOLATILE are used, nor have they ever
been as far back as I can see.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Remove renaming #defines of scanhex() and skipbl()
Michael Ellerman [Tue, 9 Oct 2012 04:20:33 +0000 (04:20 +0000)]
powerpc/xmon: Remove renaming #defines of scanhex() and skipbl()

We have two #defines that rename scanhex() and skipbl() to
xmon_scanhex() and xmon_skipbl() - but no one ever uses those
names.

So the only effect is to rename the actual symbols in the generated
code, and AFACIS there is no reason to do that, so drop them.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Merge start.c into nonstdio.c
Michael Ellerman [Tue, 9 Oct 2012 04:20:32 +0000 (04:20 +0000)]
powerpc/xmon: Merge start.c into nonstdio.c

The routines in start.c are only ever called from nonstdio.c, so if we
move them in there they can become static which is nice.

I suspect the idea behind the separation was that start.c could be
replaced in order to build xmon in userland. If anyone still cares about
doing that we could handle that with an ifdef or two.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Make xmon_getchar() static
Michael Ellerman [Tue, 9 Oct 2012 04:20:31 +0000 (04:20 +0000)]
powerpc/xmon: Make xmon_getchar() static

xmon_getchar() is only called from within nonstdio.c, so make it static.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Remove empty xmon_map_scc()
Michael Ellerman [Tue, 9 Oct 2012 04:20:30 +0000 (04:20 +0000)]
powerpc/xmon: Remove empty xmon_map_scc()

This has been empty since 2005, commit 51d3082 "Unify udbg (#2)".

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/xmon: Remove unused xmon_expect() & xmon_read_poll()
Michael Ellerman [Tue, 9 Oct 2012 04:20:29 +0000 (04:20 +0000)]
powerpc/xmon: Remove unused xmon_expect() & xmon_read_poll()

It looks like xmon_expect() was used for doing xmon over a modem (!?),
that code was dropped in 2005 in commit 51d3082 "Unify udbg (#2)".

Once xmon_expect() is gone xmon_read_poll() is unused, drop it too.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/udbg: Remove unused udbg_read()
Michael Ellerman [Tue, 9 Oct 2012 04:20:28 +0000 (04:20 +0000)]
powerpc/udbg: Remove unused udbg_read()

The last user of udbg_read() was removed in 2005, in commit fca5dcd
"Simplify and clean up the xmon terminal I/O".

Given we haven't needed it for 7 years we can probably drop it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/windfarm: Use module_i2c_driver to simplify the code
Wei Yongjun [Mon, 8 Oct 2012 03:00:04 +0000 (03:00 +0000)]
powerpc/windfarm: Use module_i2c_driver to simplify the code

Use the module_i2c_driver() macro to make the code smaller
and a bit simpler.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Add asm/debug.h to get powerpc_debugfs_root
Tony Breeds [Tue, 2 Oct 2012 15:52:41 +0000 (15:52 +0000)]
powerpc: Add asm/debug.h to get powerpc_debugfs_root

Since the "Disintegrate asm/system.h for PowerPC"
(ae3a197e3d0bfe3f4bf1693723e82dc018c096f3) This has been failing when
DEBUG is #defined.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/47x: Use the new ppc-opcode infrastructure
Tony Breeds [Tue, 2 Oct 2012 15:52:19 +0000 (15:52 +0000)]
powerpc/47x: Use the new ppc-opcode infrastructure

Don't use 47x only #defines for TLBIVAX or ICBT, supply and use helpers
in ppc-opcode.h

This fixes a compile breakage.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: dtc is required to build dtb files
Matthew McClintock [Tue, 18 Sep 2012 09:50:55 +0000 (09:50 +0000)]
powerpc: dtc is required to build dtb files

Fixes this following:

$ make distclean; make corenet32_smp_defconfig; make p4080ds.dtb
  CLEAN   arch/powerpc/boot
  CLEAN   scripts/basic
  CLEAN   scripts/dtc
  CLEAN   scripts/genksyms
  CLEAN   scripts/kconfig
  CLEAN   scripts/mod
  CLEAN   scripts
  CLEAN   include/config include/generated
  CLEAN   .config
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  SHIPPED scripts/kconfig/zconf.tab.c
  SHIPPED scripts/kconfig/zconf.lex.c
  SHIPPED scripts/kconfig/zconf.hash.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
scripts/kconfig/conf --silentoldconfig Kconfig
  DTC     arch/powerpc/boot/p4080ds.dtb
/bin/sh: /local/home/mattsm/git/linux/scripts/dtc/dtc: No such file or directory
make[1]: *** [arch/powerpc/boot/p4080ds.dtb] Error 1
make: *** [p4080ds.dtb] Error 2

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc/pseries: Double NR_CPUS in defconfig
Nishanth Aravamudan [Wed, 12 Sep 2012 07:47:07 +0000 (07:47 +0000)]
powerpc/pseries: Double NR_CPUS in defconfig

Anticipating growth in coming years, we should ensure we are getting a
good lead on testing.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agofbdev: Add GXT4000P and GXT6500P support to the gxt4500 driver
Dan Horák [Wed, 12 Sep 2012 06:06:44 +0000 (06:06 +0000)]
fbdev: Add GXT4000P and GXT6500P support to the gxt4500 driver

I'm reviving an old patch from 2009 that adds support for GXT4000P and GXT6500P
adapter to the gxt4500 driver.

See threads at http://marc.info/?l=linux-fbdev-devel&m=124345080216952&w=2
and https://lists.ozlabs.org/pipermail/linuxppc-dev/2009-June/072672.html
for more details.

This patch adds support for GXT4000P and GXT6500P cards found on some
IBM pSeries machines.
GXT4000P/6000P and GXT4500P/6500P  couples are  identical from
software's point of view and are based on the same  Raster Engine
(RC1000), except for a different reference clock for the PLL.
GXT6x00P models are equipped with an additional Geometry Engine
(GT1000) but this driver doesn't use it.

Signed-off-by: Nico Macrionitis <acrux@cruxppc.org>
Signed-off-by: Giuseppe Coviello <cjg@cruxppc.org>
Tested-by: Dan Horák <dan@danny.cz>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agocpuidle/powerpc: Fix snooze state problem in the cpuidle design on pseries.
Deepthi Dharwar [Wed, 3 Oct 2012 18:42:26 +0000 (18:42 +0000)]
cpuidle/powerpc: Fix snooze state problem in the cpuidle design on pseries.

Earlier without cpuidle framework on pseries, the native arch
idle routine comprised of both snooze and nap
states.  smt_snooze_delay variable was used to delay
the idle process entry to deeper idle state like  nap.
With the coming of cpuidle, this arch specific idle was replaced
by two different idle routines, one for supporting snooze and other
for nap. This enabled addition of more
low level idle states on pseries in the future.

On adopting the generic cpuidle framework for POWER systems,
the decision of which idle state to choose from,  given a predicted
idle time is taken by the menu governor based on
target_residency and  exit_latency of the idle states.
target_residency is the minimum time to be resident in that idle state.
Exit_latency is time taken to exit out of idle state.
Deeper the idle state, both the target residency and exit latency
would be higher.

In the current design, smt_snooze_delay is used as target_residency
for the  snooze state which is incorrect, as it is not the
minimum but the maximum duration to be in snooze state.
This would  result in the governor in taking bad decision,
as presently target_residency of nap < target_residency of snooze
inspite of nap being deeper idle state.

This patch aims to fix this problem by replacing the smt_snooze_delay loop
in snooze state, with the need_resched()  as the governor is aware of
entry and exit of various idle transitions based on which
next idle time prediction.

The governor is intelligent enough to determine the idle state the needs to
be transitioned to and maintains a whole of heuristics including
io load, previous idle states predictions etc for the same, based on
which idle state entry decision is taken.

With this fix, of setting target_residency of snooze to 0
     nap to smt_snooze_delay
if the predicted idle time is less
than smt_snooze_delay (target_residency of nap)
value governor would pick snooze state, else nap. This adhers to the
previous native idle design.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agocpuidle/powerpc: Fix smt_snooze_delay functionality.
Deepthi Dharwar [Wed, 3 Oct 2012 18:42:18 +0000 (18:42 +0000)]
cpuidle/powerpc: Fix smt_snooze_delay functionality.

smt_snooze_delay was designed to  delay idle loop's nap entry
in the native idle code before it got  ported over to use as part of
the cpuidle framework.

A -ve value  assigned to smt_snooze_delay should result in
busy looping, in other words disabling the entry to nap state.

- https://lists.ozlabs.org/pipermail/linuxppc-dev/2010-May/082450.html

This particular functionality can be achieved currently by
echo 1 > /sys/devices/system/cpu/cpu*/state1/disable
but it is broken when one assigns -ve value to  the smt_snooze_delay
variable either via sysfs entry or ppc64_cpu util.

This patch aims to fix this, by disabling nap state when smt_snooze_delay
variable is set to -ve value.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agocpuidle/powerpc: Fix target residency initialisation in pseries cpuidle
Deepthi Dharwar [Wed, 3 Oct 2012 18:42:10 +0000 (18:42 +0000)]
cpuidle/powerpc: Fix target residency initialisation in pseries cpuidle

Remove the redundant target residency initialisation in pseries_cpuidle_driver_init().
This is currently over-writing the residency time updated as part of the static
table, resulting in  all the idle states having the same target
residency of 100us which is incorrect. This may result in the menu governor making
wrong state decisions.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agopowerpc: Build fix for powerpc KVM
Aneesh Kumar K.V [Tue, 16 Oct 2012 22:25:45 +0000 (22:25 +0000)]
powerpc: Build fix for powerpc KVM

Fix build failure for powerpc KVM by adding missing VPN_SHIFT definition
and the ';'

arch/powerpc/kvm/book3s_32_mmu_host.c: In function 'kvmppc_mmu_map_page':
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: 'VPN_SHIFT' undeclared (first use in this function)
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: (Each undeclared identifier is reported only once
arch/powerpc/kvm/book3s_32_mmu_host.c:176: error: for each function it appears in.)
arch/powerpc/kvm/book3s_32_mmu_host.c:178: error: expected ';' before 'next_pteg'
arch/powerpc/kvm/book3s_32_mmu_host.c:190: error: label 'next_pteg' used but not defined
make[1]: *** [arch/powerpc/kvm/book3s_32_mmu_host.o] Error 1

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agoRevert "powerpc/perf: Use pmc_overflow() to detect rolled back events"
Benjamin Herrenschmidt [Wed, 17 Oct 2012 23:36:11 +0000 (10:36 +1100)]
Revert "powerpc/perf: Use pmc_overflow() to detect rolled back events"

This reverts commit 813312110bede27bffd082c25cd31730bd567beb.

This revert was requested by the author of the patch as it seems
to cause system hangs with some low frequency events

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Wed, 17 Oct 2012 19:41:18 +0000 (12:41 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix regression in /proc/net/if_inet6, sometimes devices do not get
    listed.  From Eric Dumazet.

 2) Add IPSEC networking sub-section to MAINTAINERS.

 3) S390 networking fixes from Hendrik Brueckner and Stefan Raspl.

 4) Fix enslavement of devices that can't do VLAN properly, from Jiri
    Pirko.

 5) SCTP sack handling fix from Zijie Pan.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  ipv6: addrconf: fix /proc/net/if_inet6
  bnx2x: fix handling mf storage modes
  qeth: fix deadlock between recovery and bonding driver
  smsgiucv: reestablish IUCV path after resume
  sctp: fix call to SCTP_CMD_PROCESS_SACK in sctp_cmd_interpreter()
  vlan: fix bond/team enslave of vlan challenged slave/port
  MAINTAINERS: Add explicit section for IPSEC networking.

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Wed, 17 Oct 2012 19:40:44 +0000 (12:40 -0700)]
Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:
 "Two sparc64 perf bug fixes and add a sysrq facility so I can diagnose
  these kinds of problems more quickly in the future."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Fix bit twiddling in sparc_pmu_enable_event().
  sparc64: Add global PMU register dumping via sysrq.
  sparc64: Like x86 we should check current->mm during perf backtrace generation.

12 years agoMerge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh
Linus Torvalds [Wed, 17 Oct 2012 02:24:00 +0000 (19:24 -0700)]
Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh

Pull SuperH updates from Paul Mundt.

The bulk of this is the UAPI disintegration for SH.

* tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
  sh: Fix up more fallout from pointless ARM __iomem churn.
  sh: Wire up kcmp syscall.
  UAPI: (Scripted) Disintegrate arch/sh/include/asm

12 years agoMerge branch 'frv' (FRV patches from David Howells)
Linus Torvalds [Wed, 17 Oct 2012 01:49:22 +0000 (18:49 -0700)]
Merge branch 'frv' (FRV patches from David Howells)

Merge emailed FRV fixes from David Howells.

* frv:
  FRV: Fix linux/elf-fdpic.h
  FRV: Fix const sections change
  FRV: Fix incorrect symbol in copy_thread()
  FRV: Fix VLIW packing constraint violation in entry.S

12 years agoFRV: Fix linux/elf-fdpic.h
David Howells [Mon, 15 Oct 2012 23:10:35 +0000 (00:10 +0100)]
FRV: Fix linux/elf-fdpic.h

It seems I accidentally switched the guard on linux/elf-fdpic.h from #ifdef
__KERNEL__ to #ifndef __KERNEL__ when attempting to expand the guarded region
to cover the elf_fdpic_params struct when doing the UAPI split - with the
result that the struct became unavailable to kernel code.

Move incorrectly guarded bits back to the kernelspace header.

Whilst we're at it, the __KERNEL__ guards can be deleted as they're no longer
necessary.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Fengguang Wu <fengguang.wu@intel.com>
cc: Lars-Peter Clausen <lars@metafoo.de>
cc: uclinux-dev@uclinux.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoFRV: Fix const sections change
Andi Kleen [Mon, 15 Oct 2012 23:10:28 +0000 (00:10 +0100)]
FRV: Fix const sections change

Add __pminitconst to fix the build, otherwise the following error can occur:

  arch/frv/kernel/setup.c:187:47: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
  arch/frv/kernel/setup.c:386:2: error: 'clock_cmodes' undeclared (first use in this function)
  arch/frv/kernel/setup.c:571:6: error: 'clock_cmodes' undeclared (first use in this function)
  make[2]: *** [arch/frv/kernel/setup.o] Error 1

http://kisskb.ellerman.id.au/kisskb/buildresult/7344691/

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoFRV: Fix incorrect symbol in copy_thread()
David Howells [Mon, 15 Oct 2012 23:10:21 +0000 (00:10 +0100)]
FRV: Fix incorrect symbol in copy_thread()

Fix an incorrect symbol in copy_thread():

  arch/frv/kernel/process.c: In function 'copy_thread':
  arch/frv/kernel/process.c:197: error: 'chilregs' undeclared (first use in this function)
  arch/frv/kernel/process.c:197: error: (Each undeclared identifier is reported only once
  arch/frv/kernel/process.c:197: error: for each function it appears in.)

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoFRV: Fix VLIW packing constraint violation in entry.S
David Howells [Mon, 15 Oct 2012 23:10:13 +0000 (00:10 +0100)]
FRV: Fix VLIW packing constraint violation in entry.S

Fix VLIW packing constraint violation in entry.S:

  arch/frv/kernel/entry.S: Assembler messages:
  arch/frv/kernel/entry.S:871: Error: VLIW packing constraint violation

When packing CALLL with OR, CALLL must go in the first slot.  The
instructions are executed simultaneously, so it doesn't matter which way
round they're packed from that point of view.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoprintk: Fix scheduling-while-atomic problem in console_cpu_notify()
Paul E. McKenney [Tue, 16 Oct 2012 04:35:59 +0000 (21:35 -0700)]
printk: Fix scheduling-while-atomic problem in console_cpu_notify()

The console_cpu_notify() function runs with interrupts disabled in the
CPU_DYING case.  It therefore cannot block, for example, as will happen
when it calls console_lock().  Therefore, remove the CPU_DYING leg of
the switch statement to avoid this problem.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Wed, 17 Oct 2012 01:14:31 +0000 (18:14 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Fixes for i915, nouveau and radeon:

   - i915: haswell stability, modeset rework fallout, ums fix
   - nouveau: misc fixes from code rework
   - radeon: pll rework fixes, more 2 level PTE cleanups.
   - core: warning fixes on 32-bit."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (31 commits)
  nouveau: fix warning on 32-bit build.
  drm/nouveau/bios: fix typo in error message
  drm/nouveau: only call ttm_agp_tt_create when __OS_HAS_AGP
  drm/nv50/fb: fix double free of vram mm
  drm/nouveau/pm: do not stop reclocking if failing to set the fan speed
  drm/nouveau/pm: fix a typo related to the move to the therm subdev
  drm/nouveau/hwmon: fix the initialization condition
  drm: fix warning on 32-bit.
  drm: radeon: fix printk format warning
  drm/radeon: fix spelling typos in debugging output
  drm/radeon: Don't destroy I2C Bus Rec in radeon_ext_tmds_enc_destroy().
  drm/radeon: check if pcie gen 2 is already enabled (v2)
  drm/radeon/cayman: set VM max pfn at MC init
  drm/radeon: separate pt alloc from lru add
  drm/radeon: don't add the IB pool to all VMs v2
  drm/radeon: allocate page tables on demand v4
  drm/radeon: update comments to clarify VM setup (v2)
  drm/radeon: allocate PPLLs from low to high
  drm/radeon: fix compilation with backlight disabled
  drm/radeon: use %zu for formatting size_t
  ...

12 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Wed, 17 Oct 2012 01:12:38 +0000 (18:12 -0700)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs

Pull ext2, ext3, quota fixes from Jan Kara:
 "Fix three regressions caused by user namespace conversions (ext2,
  ext3, quota) and minor ext3 fix and cleanup."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Silence warning about PRJQUOTA not being handled in need_print_warning()
  ext3: fix return values on parse_options() failure
  ext2: fix return values on parse_options() failure
  ext3: ext3_bread usage audit
  ext3: fix possible non-initialized variable on htree_dirblock_to_tree()

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Wed, 17 Oct 2012 01:11:48 +0000 (18:11 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "Fix for my braino in replace_fd(), dhowell's fix for the fallout from
  over-enthusiastic bo^Wdeclaration movements plus crapectomy that
  should've happened a long time ago (SEL_...  definitions)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  bury SEL_{IN,OUT,EX}
  Unexport some bits of linux/fs.h
  fix a leak in replace_fd() users

12 years agoMerge tag 'pinctrl-fixes-v3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 17 Oct 2012 01:10:26 +0000 (18:10 -0700)]
Merge tag 'pinctrl-fixes-v3.7-rc2' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl fixes from Linus Walleij:
 "A number of pinctrl fixes for the v3.7 series:
   - duplicate includes, section markup, code mishaps
   - erroneous return value in errorpath on the bcm2835 driver
   - remove an unused sirf function that was causing build errors
   - multiple-platform compilation stubs and a missed code review
     comment fixup on the nomadik pin controller"

* tag 'pinctrl-fixes-v3.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl/nomadik: always use the simple irqdomain
  pinctrl/nomadik: provide stubs for legacy Nomadik
  pinctrl: remove duplicated include from pinctrl-xway.c
  pinctrl: sirf: remove sirfsoc_gpio_set_pull function
  pinctrl: fix return value in bcm2835_pinctrl_probe()
  pinctrl: remove duplicated include from pinctrl-bcm2835.c
  pinctrl: bcm2835: Use existing pointer to struct device
  pinctrl: samsung: use __devinit section for init code

12 years agoMerge branch 'ipmi' (IPMI patches from Corey Minyard)
Linus Torvalds [Wed, 17 Oct 2012 01:08:21 +0000 (18:08 -0700)]
Merge branch 'ipmi' (IPMI patches from Corey Minyard)

Merge emailed patches from Corey Minyard:
 "Remove some bogus docs, Fix ACPI/IPMI interactions, fix some warnings,
  and add register spacing detection for PCI interfaces."

* ipmi:
  IPMI: Detect register spacing on PCI interfaces
  IPMI: Fix some uninitialized warning
  IPMI: Change link order
  ACPI: Reorder IPMI driver before any other ACPI drivers
  IPMI: Remove SMBus driver info from the docs

12 years agoIPMI: Detect register spacing on PCI interfaces
Corey Minyard [Tue, 16 Oct 2012 20:53:40 +0000 (15:53 -0500)]
IPMI: Detect register spacing on PCI interfaces

The IPMI spec defines a way to detect register spacing for PCI interfaces,
so implement it.

Signed-off-by: Steven Hsieh <sshsieh@broadcom.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoIPMI: Fix some uninitialized warning
Corey Minyard [Tue, 16 Oct 2012 20:53:39 +0000 (15:53 -0500)]
IPMI: Fix some uninitialized warning

There was a spot where the compiler couldn't tell some variables
would be set.  So initialize them to make the warning go away.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoIPMI: Change link order
Matthew Garrett [Tue, 16 Oct 2012 20:53:38 +0000 (15:53 -0500)]
IPMI: Change link order

IPMI must be initialised before ACPI in order to ensure that any IPMI
services are available before ACPI driver initialisation attempts to use
any IPMI operation regions.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoACPI: Reorder IPMI driver before any other ACPI drivers
Matthew Garrett [Tue, 16 Oct 2012 20:53:37 +0000 (15:53 -0500)]
ACPI: Reorder IPMI driver before any other ACPI drivers

Drivers may make calls that require the ACPI IPMI driver to have been
initialised already, so make sure that it appears earlier in the build
order.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoIPMI: Remove SMBus driver info from the docs
Corey Minyard [Tue, 16 Oct 2012 20:53:36 +0000 (15:53 -0500)]
IPMI: Remove SMBus driver info from the docs

Some documentation for the SMBus driver is in the IPMI docs, but that
code is not in the kernel tree at this point.  So remove the docs to
avoid confusion.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMAINTAINERS: change email after moving for LED subsystem maintaining
Bryan Wu [Tue, 16 Oct 2012 19:55:19 +0000 (12:55 -0700)]
MAINTAINERS: change email after moving for LED subsystem maintaining

Signed-off-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm, mempolicy: fix printing stack contents in numa_maps
David Rientjes [Wed, 17 Oct 2012 00:31:23 +0000 (17:31 -0700)]
mm, mempolicy: fix printing stack contents in numa_maps

When reading /proc/pid/numa_maps, it's possible to return the contents of
the stack where the mempolicy string should be printed if the policy gets
freed from beneath us.

This happens because mpol_to_str() may return an error the
stack-allocated buffer is then printed without ever being stored.

There are two possible error conditions in mpol_to_str():

 - if the buffer allocated is insufficient for the string to be stored,
   and

 - if the mempolicy has an invalid mode.

The first error condition is not triggered in any of the callers to
mpol_to_str(): at least 50 bytes is always allocated on the stack and this
is sufficient for the string to be written.  A future patch should convert
this into BUILD_BUG_ON() since we know the maximum strlen possible, but
that's not -rc material.

The second error condition is possible if a race occurs in dropping a
reference to a task's mempolicy causing it to be freed during the read().
The slab poison value is then used for the mode and mpol_to_str() returns
-EINVAL.

This race is only possible because get_vma_policy() believes that
mm->mmap_sem protects task->mempolicy, which isn't true.  The exit path
does not hold mm->mmap_sem when dropping the reference or setting
task->mempolicy to NULL: it uses task_lock(task) instead.

Thus, it's required for the caller of a task mempolicy to hold
task_lock(task) while grabbing the mempolicy and reading it.  Callers with
a vma policy store their mempolicy earlier and can simply increment the
reference count so it's guaranteed not to be freed.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agosparc64: Fix bit twiddling in sparc_pmu_enable_event().
David S. Miller [Tue, 16 Oct 2012 20:05:25 +0000 (13:05 -0700)]
sparc64: Fix bit twiddling in sparc_pmu_enable_event().

There was a serious disconnect in the logic happening in
sparc_pmu_disable_event() vs. sparc_pmu_enable_event().

Event disable is implemented by programming a NOP event into the PCR.

However, event enable was not reversing this operation.  Instead, it
was setting the User/Priv/Hypervisor trace enable bits.

That's not sparc_pmu_enable_event()'s job, that's what
sparc_pmu_enable() and sparc_pmu_disable() do .

The intent of sparc_pmu_enable_event() is clear, since it first clear
out the event type encoding field.  So fix this by OR'ing in the event
encoding rather than the trace enable bits.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoipv6: addrconf: fix /proc/net/if_inet6
Eric Dumazet [Tue, 16 Oct 2012 07:37:27 +0000 (07:37 +0000)]
ipv6: addrconf: fix /proc/net/if_inet6

Commit 1d5783030a1 (ipv6/addrconf: speedup /proc/net/if_inet6 filling)
added bugs hiding some devices from if_inet6 and breaking applications.

"ip -6 addr" could still display all IPv6 addresses, while "ifconfig -a"
couldnt.

One way to reproduce the bug is by starting in a shell :

unshare -n /bin/bash
ifconfig lo up

And in original net namespace, lo device disappeared from if_inet6

Reported-by: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
Tested-by: Jan Hinnerk Stosch <janhinnerk.stosch@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Mihai Maruseac <mihai.maruseac@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobnx2x: fix handling mf storage modes
Dmitry Kravkov [Tue, 16 Oct 2012 01:28:27 +0000 (01:28 +0000)]
bnx2x: fix handling mf storage modes

Since commit a3348722 AFEX FCoE function is continuously reset.
The patch prevents the resetting and removes debug print
to stop garbaging syslog.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqeth: fix deadlock between recovery and bonding driver
Stefan Raspl [Mon, 15 Oct 2012 19:21:18 +0000 (19:21 +0000)]
qeth: fix deadlock between recovery and bonding driver

The recovery thread, when failing, tears down the respective interface. To do
so, it needs to obtain the rtnl lock first, as the interface configuration is
changed.
If another process tries to modify an interface setting at the same time, that
process can obtain the rtnl lock first, but the respective callback in the qeth
driver will block until recovery has completed - which cannot happen since the
calling process already obtained it.
In one particular case, the bonding driver acquired the rtnl lock to modify the
card's MAC address, while the recovery failed at the same time due to the card
being removed. Hence qeth_l2_set_mac_address (implicitly holding the rtnl lock)
was waiting on qeth_l2_recover, which deadlocked when waiting on the rtnl lock.
This patch uses rtnl_trylock instead of rtnl_lock in the recovery thread. If the
lock cannot be obtained, the interface will be left up, but the card state
remains in CARD_STATE_RECOVER, which will prevent any further activities on the
card.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosmsgiucv: reestablish IUCV path after resume
Hendrik Brueckner [Mon, 15 Oct 2012 19:21:17 +0000 (19:21 +0000)]
smsgiucv: reestablish IUCV path after resume

smsg_pm_restore_thaw() uses wrong checking before reconnecting
the IUCV path to *MSG. It is corrected with this patch.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosctp: fix call to SCTP_CMD_PROCESS_SACK in sctp_cmd_interpreter()
Zijie Pan [Mon, 15 Oct 2012 03:56:39 +0000 (03:56 +0000)]
sctp: fix call to SCTP_CMD_PROCESS_SACK in sctp_cmd_interpreter()

Bug introduced by commit edfee0339e681a784ebacec7e8c2dc97dc6d2839
(sctp: check src addr when processing SACK to update transport state)

Signed-off-by: Zijie Pan <zijie.pan@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agovlan: fix bond/team enslave of vlan challenged slave/port
Jiri Pirko [Sun, 14 Oct 2012 04:30:56 +0000 (04:30 +0000)]
vlan: fix bond/team enslave of vlan challenged slave/port

In vlan_uses_dev() check for number of vlan devs rather than existence
of vlan_info. The reason is that vlan id 0 is there without appropriate
vlan dev on it by default which prevented from enslaving vlan challenged
dev.

Reported-by: Jon Stanley <jstanley@rmrf.net>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMAINTAINERS: Add explicit section for IPSEC networking.
David S. Miller [Tue, 16 Oct 2012 18:08:40 +0000 (14:08 -0400)]
MAINTAINERS: Add explicit section for IPSEC networking.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobury SEL_{IN,OUT,EX}
Al Viro [Tue, 16 Oct 2012 17:37:17 +0000 (13:37 -0400)]
bury SEL_{IN,OUT,EX}

Had not been used for more than a decade and half; it used
to be a part of (in-kernel) ->select() API and it has been pining
for fjords since 2.1.23pre1.  This is an ex-parrot...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
12 years agoUnexport some bits of linux/fs.h
David Howells [Mon, 15 Oct 2012 15:40:35 +0000 (16:40 +0100)]
Unexport some bits of linux/fs.h

There are some bits of linux/fs.h which are only used within the kernel and
shouldn't be in the UAPI.  Move these from uapi/linux/fs.h into linux/fs.h.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
12 years agofix a leak in replace_fd() users
Al Viro [Tue, 16 Oct 2012 17:30:07 +0000 (13:30 -0400)]
fix a leak in replace_fd() users

replace_fd() began with "eats a reference, tries to insert into
descriptor table" semantics; at some point I'd switched it to
much saner current behaviour ("try to insert into descriptor
table, grabbing a new reference if inserted; caller should do
fput() in any case"), but forgot to update the callers.
Mea culpa...

[Spotted by Pavel Roskin, who has really weird system with pipe-fed
coredumps as part of what he considers a normal boot ;-)]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
12 years agosparc64: Add global PMU register dumping via sysrq.
David S. Miller [Tue, 16 Oct 2012 16:34:01 +0000 (09:34 -0700)]
sparc64: Add global PMU register dumping via sysrq.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonouveau: fix warning on 32-bit build.
Dave Airlie [Tue, 16 Oct 2012 06:40:53 +0000 (16:40 +1000)]
nouveau: fix warning on 32-bit build.

Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agoMerge branch 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux...
Dave Airlie [Tue, 16 Oct 2012 06:33:48 +0000 (16:33 +1000)]
Merge branch 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes

minor set of nouveau fixes.

* 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/bios: fix typo in error message
  drm/nouveau: only call ttm_agp_tt_create when __OS_HAS_AGP
  drm/nv50/fb: fix double free of vram mm
  drm/nouveau/pm: do not stop reclocking if failing to set the fan speed
  drm/nouveau/pm: fix a typo related to the move to the therm subdev
  drm/nouveau/hwmon: fix the initialization condition

12 years agodrm/nouveau/bios: fix typo in error message
Ben Skeggs [Tue, 16 Oct 2012 06:25:08 +0000 (16:25 +1000)]
drm/nouveau/bios: fix typo in error message

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm/nouveau: only call ttm_agp_tt_create when __OS_HAS_AGP
Max Filippov [Sat, 13 Oct 2012 21:58:26 +0000 (01:58 +0400)]
drm/nouveau: only call ttm_agp_tt_create when __OS_HAS_AGP

ttm_agp_tt_create is itself defined under CONFIG_AGP, so there's no
point calling it otherwise.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm/nv50/fb: fix double free of vram mm
Marcin Slusarz [Thu, 11 Oct 2012 21:53:48 +0000 (23:53 +0200)]
drm/nv50/fb: fix double free of vram mm

nouveau_fb_destroy already calls nouveau_mm_fini on vram mm.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm/nouveau/pm: do not stop reclocking if failing to set the fan speed
Martin Peres [Wed, 3 Oct 2012 23:00:13 +0000 (01:00 +0200)]
drm/nouveau/pm: do not stop reclocking if failing to set the fan speed

With the introduction of fan management modes, fan may not be drivable.
We should allow reclocking nonetheless.

This return was stupid to begin with since it may have left the card
in an intermediate state (clocks corresponding to a perflvl and voltage
corresponding to another one). The reclocking code will need to be
rewritten in a near-future in order to provide a better error handling.

Reported-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm/nouveau/pm: fix a typo related to the move to the therm subdev
Martin Peres [Wed, 3 Oct 2012 22:44:19 +0000 (00:44 +0200)]
drm/nouveau/pm: fix a typo related to the move to the therm subdev

Reported-by: Vekin on IRC
Reported-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm/nouveau/hwmon: fix the initialization condition
Martin Peres [Wed, 3 Oct 2012 22:28:21 +0000 (00:28 +0200)]
drm/nouveau/hwmon: fix the initialization condition

Signed-off-by: Martin Peres <martin.peres@labri.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
12 years agodrm: fix warning on 32-bit.
Dave Airlie [Tue, 16 Oct 2012 00:28:21 +0000 (10:28 +1000)]
drm: fix warning on 32-bit.

This cast was causing a warning on 32-bit builds.

Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agodrm: radeon: fix printk format warning
Randy Dunlap [Tue, 16 Oct 2012 00:15:45 +0000 (10:15 +1000)]
drm: radeon: fix printk format warning

drivers/gpu/drm/radeon/radeon_atpx_handler.c:151:3: warning: format '%lu' expects type 'long unsigned int', but argument 2 has type 'size_t'

[airlied: Alex had others fixed already, except for atpx one]

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agoMerge branch 'drm-fixes-3.7' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Tue, 16 Oct 2012 00:13:24 +0000 (10:13 +1000)]
Merge branch 'drm-fixes-3.7' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

Alex writes:
"This is the first -fixes pull for 3.7.  I would have preferred
to have gotten it out a bit sooner, but I was on holiday last week.
- Cleanup of the new 2 level page table code it get it in
  better shape and using less memory.
- Fix some display issues related to the PLL rework.
- Fix some cmpiler warnings and errors with certain config
  options.
- Other misc bug fixes."

* 'drm-fixes-3.7' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix spelling typos in debugging output
  drm/radeon: Don't destroy I2C Bus Rec in radeon_ext_tmds_enc_destroy().
  drm/radeon: check if pcie gen 2 is already enabled (v2)
  drm/radeon/cayman: set VM max pfn at MC init
  drm/radeon: separate pt alloc from lru add
  drm/radeon: don't add the IB pool to all VMs v2
  drm/radeon: allocate page tables on demand v4
  drm/radeon: update comments to clarify VM setup (v2)
  drm/radeon: allocate PPLLs from low to high
  drm/radeon: fix compilation with backlight disabled
  drm/radeon: use %zu for formatting size_t

12 years agoMerge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
Dave Airlie [Tue, 16 Oct 2012 00:11:29 +0000 (10:11 +1000)]
Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes

Daniel writes:
"- some register magic to fix hsw crw (Paulo&Ben)
- fix backlight destruction for cpu edp (Jani)
- fix gen ch7xxx dvo ->get_hw_state
- fixup the plane->pipe fixup code, the broken version massively angers
  the modeset sanity checks
- kill pipe A quirk for i855gm, otherwise I get a black screen with the
  above patch
- fixup for gem_get_page helper (Chris)
- fixup guardband clipping w/a (Ken), without this mesa master can erronously
  drop vertices on snb, mesa 9.0 has the optimization reverted
- another pageflip vs. modeset fix
- kill bogus BUG_ON which broke ums+gem from Willy Tarreau (gasp, people
  are still using this!)"

* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
  drm/i915: fix non-DP-D eDP backlight cleanup and module reload
  drm/i915: HSW CRW stability magic
  drm/i915/dvo-ch7xxx: fix get_hw_state
  drm/i915: fixup the plane->pipe fixup code
  drm/i915: rip out the pipe A quirk for i855gm
  drm/i915: disable wc gtt pte mappings on gen2
  drm/i915: fixup i915_gem_object_get_page inline helper
  drm/i915: Disallow preallocation of requests
  drm/i915: Set guardband clipping workaround bit in the right register.
  drm/i915: paper over a pipe-enable vs pageflip race
  drm/i915: remove useless BUG_ON which caused a regression in 3.5.

12 years agothermal, cpufreq: Fix build when CPU_FREQ_TABLE isn't configured
David Rientjes [Mon, 15 Oct 2012 20:40:15 +0000 (13:40 -0700)]
thermal, cpufreq: Fix build when CPU_FREQ_TABLE isn't configured

Commit 023614183768 ("thermal: add generic cpufreq cooling
implementation") requires cpufreq_frequency_get_table(), but that
function is only defined for CONFIG_CPU_FREQ_TABLE resulting in the
following build error:

  drivers/built-in.o: In function `cpufreq_get_max_state':
  drivers/thermal/cpu_cooling.c:259: undefined reference to `cpufreq_frequency_get_table'
  drivers/built-in.o: In function `get_cpu_frequency':
  drivers/thermal/cpu_cooling.c:129: undefined reference to `cpufreq_frequency_get_table'

Fix it by selecting CONFIG_CPU_FREQ_TABLE for such a configuration.

It turns out CONFIG_EXYNOS_THERMAL also needs CONFIG_CPU_FREQ_TABLE, so
select it there as well.

Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agokbuild: Fix accidental revert in commit fe04ddf
Michal Marek [Mon, 15 Oct 2012 19:16:56 +0000 (21:16 +0200)]
kbuild: Fix accidental revert in commit fe04ddf

Commit fe04ddf7c291 ("kbuild: Do not package /boot and /lib in make
tar-pkg") accidentally reverted two previous kbuild commits.  I don't
know what I was thinking.

This brings back changes made by commits 24cc7fb69a5b ("x86/kbuild:
archscripts depends on scripts_basic") and c1c1a59e37da ("firmware: fix
directory creation rule matching with make 3.80")

Reported-by: Jan Beulich <JBeulich@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrm/radeon: fix spelling typos in debugging output
Thomas Friebel [Mon, 15 Oct 2012 17:16:22 +0000 (13:16 -0400)]
drm/radeon: fix spelling typos in debugging output

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
12 years agodrm/radeon: Don't destroy I2C Bus Rec in radeon_ext_tmds_enc_destroy().
Egbert Eich [Mon, 15 Oct 2012 06:21:39 +0000 (08:21 +0200)]
drm/radeon: Don't destroy I2C Bus Rec in radeon_ext_tmds_enc_destroy().

radeon_i2c_fini() walks thru the list of I2C bus recs rdev->i2c_bus[]
to destroy each of them.
radeon_ext_tmds_enc_destroy() however also has code to destroy it's
associated I2C bus rec which has been obtained by radeon_i2c_lookup()
and is therefore also in the i2c_bus[] list.
This causes a double free resulting in a kernel panic when unloading
the radeon driver.
Removing destroy code from radeon_ext_tmds_enc_destroy() fixes this
problem.

agd5f: fix compiler warning

Signed-off-by: Egbert Eich <eich@suse.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
12 years agodrm/radeon: check if pcie gen 2 is already enabled (v2)
Alex Deucher [Mon, 8 Oct 2012 21:46:27 +0000 (17:46 -0400)]
drm/radeon: check if pcie gen 2 is already enabled (v2)

If so, skip enabling it to save time.

v2: coding style fixes

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
12 years agodrm/radeon/cayman: set VM max pfn at MC init
Alex Deucher [Mon, 8 Oct 2012 16:15:13 +0000 (12:15 -0400)]
drm/radeon/cayman: set VM max pfn at MC init

No need to emit them at VM flush as we no longer use
variable sized page tables now that we support 2 level
page tables.  This matches the behavior of SI (which
does not support variable sized page tables).

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
12 years agodrm/radeon: separate pt alloc from lru add
Christian König [Tue, 9 Oct 2012 11:31:19 +0000 (13:31 +0200)]
drm/radeon: separate pt alloc from lru add

Make it possible to allocate a persistent page table.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
12 years agodrm/radeon: don't add the IB pool to all VMs v2
Christian König [Tue, 9 Oct 2012 11:31:18 +0000 (13:31 +0200)]
drm/radeon: don't add the IB pool to all VMs v2

We want to use VMs without the IB pool in the future.

v2: also remove it from radeon_vm_finish.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
12 years agodrm/radeon: allocate page tables on demand v4
Christian König [Tue, 9 Oct 2012 11:31:17 +0000 (13:31 +0200)]
drm/radeon: allocate page tables on demand v4

Based on Dmitries work, but splitting the code into page
directory and page table handling makes it far more
readable and (hopefully) more reliable.

Allocations of page tables are made from the SA on demand,
that should still work fine since all page tables are of
the same size.

Also using the fact that allocations from the SA are mostly
continuously (except for end of buffer wraps and under very
high memory pressure) to group updates send to the chipset
specific code into larger chunks.

v3: mostly a rewrite of Dmitries previous patch.
v4: fix some typos and coding style

Signed-off-by: Dmitry Cherkasov <Dmitrii.Cherkasov@amd.com>
Signed-off-by: Christian König <deathsimple@vodafone.de>
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
12 years agodrm/radeon: update comments to clarify VM setup (v2)
Alex Deucher [Mon, 8 Oct 2012 13:45:46 +0000 (09:45 -0400)]
drm/radeon: update comments to clarify VM setup (v2)

The actual set up and assignment of VM page tables
is done on the fly in radeon_gart.c.

v2: update vm size comments

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
12 years agodrm/radeon: allocate PPLLs from low to high
Alex Deucher [Fri, 5 Oct 2012 14:22:02 +0000 (10:22 -0400)]
drm/radeon: allocate PPLLs from low to high

The order shouldn't matter, but there have been problems
reported on certain older asics.  This behaves more
like the original code before the PPLL allocation
rework.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>