Anton Vorontsov af1be5a578 blackfin: fix possible deadlock in decode_address() ...

Oleg Nesterov found an interesting deadlock possibility:

> sysrq_showregs_othercpus() does smp_call_function(showacpu)
> and showacpu() show_stack()->decode_address(). Now suppose that IPI
> interrupts the task holding read_lock(tasklist).

To fix this, blackfin should not grab the write_ variant of the
tasklist lock, read_ one is enough.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2012-05-31 17:49:30 -07:00

..

cplb-mpu

blackfin: cplb-mpu: fix page mask table overflow

2012-03-21 11:00:06 +08:00

cplb-nompu

blackfin: cplb: add support for bf60x

2012-05-21 14:54:16 +08:00

.gitignore

Blackfin: ignore generated vmlinux.lds

2009-05-27 00:27:03 -04:00

asm-offsets.c

Disintegrate asm/system.h for Blackfin [ver #2]

2012-03-21 11:00:08 +08:00

bfin_dma.c

bfin_dma: fix initcall return error in proc_dma_init()

2012-05-21 14:54:40 +08:00

bfin_gpio.c

bfin_gpio: fix bf548-ezkit kernel fail to boot

2012-05-21 14:54:41 +08:00

bfin_ksyms.c

Blackfin: move internal irq prototypes out of global namespace

2011-05-25 08:13:43 -04:00

cplbinfo.c

Blackfin: cplbinfo: drop d_path() hacks

2009-10-07 04:48:04 -04:00

debug-mmrs.c

blackfin: add bf60x to current framework

2012-05-21 14:54:12 +08:00

dma-mapping.c

blackfin: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE

2011-10-31 19:31:01 -04:00

dumpstack.c

Blackfin: make hardware trace output a little more useful

2010-05-21 09:40:19 -04:00

early_printk.c

Blackfin: mass clean up of copyright/licensing info

2009-10-07 04:36:26 -04:00

entry.S

Blackfin: delete fork func

2012-05-21 14:54:39 +08:00

exception.c

Blackfin: split kernel/traps.c

2010-05-21 09:40:17 -04:00

fixed_code.S

Blackfin: mass clean up of copyright/licensing info

2009-10-07 04:36:26 -04:00

flat.c

Blackfin: mass clean up of copyright/licensing info

2009-10-07 04:36:26 -04:00

ftrace-entry.S

Blackfin: add support for dynamic ftrace

2010-08-06 12:55:54 -04:00

ftrace.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

gptimers.c

blackfin: bf60x: fix compiling warning

2012-05-21 14:54:26 +08:00

ipipe.c

Disintegrate asm/system.h for Blackfin [ver #2]

2012-03-21 11:00:08 +08:00

irqchip.c

Blackfin: move internal irq prototypes out of global namespace

2011-05-25 08:13:43 -04:00

kgdb_test.c

Disintegrate asm/system.h for Blackfin [ver #2]

2012-03-21 11:00:08 +08:00

kgdb.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

Makefile

blackfin: Use generic init_task

2012-05-05 13:00:22 +02:00

module.c

modules: make arch's use default loader hooks

2011-07-24 22:06:04 +09:30

nmi.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

perf_event.c

blackfin: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE

2011-10-31 19:31:01 -04:00

process.c

blackfin: add bf60x to current framework

2012-05-21 14:54:12 +08:00

pseudodbg.c

Blackfin: show the whole accumulator in the pseudo DBG insn

2010-05-22 14:19:06 -04:00

ptrace.c

Disintegrate asm/system.h for Blackfin [ver #2]

2012-03-21 11:00:08 +08:00

pwm.c

Blackfin: pwm: implement linux/pwm.h API

2011-07-23 01:18:23 -04:00

reboot.c

blackfin: add bf60x to current framework

2012-05-21 14:54:12 +08:00

setup.c

blackfin: fix build after add bf60x mach/pm.h

2012-05-21 14:55:07 +08:00

shadow_console.c

blackfin: add bf60x to current framework

2012-05-21 14:54:12 +08:00

signal.c

blackfin: don't open-code force_sigsegv()

2012-05-21 23:58:33 -04:00

stacktrace.c

Blackfin: add preliminary support for STACKTRACE

2009-06-13 07:20:14 -04:00

sys_bfin.c

blackfin: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE

2011-10-31 19:31:01 -04:00

time-ts.c

blackfin: bf60x: enable gptimer clock source

2012-05-21 14:54:20 +08:00

time.c

Blackfin: irq: remove IRQF_DISABLED

2011-10-26 04:22:26 -04:00

trace.c

blackfin: fix possible deadlock in decode_address()

2012-05-31 17:49:30 -07:00

traps.c

Disintegrate asm/system.h for Blackfin [ver #2]

2012-03-21 11:00:08 +08:00

vmlinux.lds.S

Blackfin: make sure percpu section is aligned in XIP builds

2011-07-23 01:18:22 -04:00