tree fe315688cb22a9c0e9758018ee21e5397264a015
parent fa260c00c1aa5c657793a7221e40d2400df5afd8
author Michal Simek <monstr@monstr.eu> 1281399504 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1281411894 -0700

asm-generic: use raw_local_irq_save/restore instead local_irq_save/restore

The start/stop_critical_timing functions for preemptirqsoff, preemptoff
and irqsoff tracers contain atomic_inc() and atomic_dec() operations.

Atomic operations use local_irq_save/restore macros to ensure atomic
access but they are traced by the same function which is causing recursion
problem.

The reason is when these tracers are turn ON then the
local_irq_save/restore macros are changed in include/linux/irqflags.h to
call trace_hardirqs_on/off which call start/stop_critical_timing.

Microblaze was affected because it uses generic atomic implementation.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>