smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init...
authorTejun Heo <tj@kernel.org>
Thu, 20 Jan 2011 11:07:13 +0000 (12:07 +0100)
committerIngo Molnar <mingo@elte.hu>
Thu, 20 Jan 2011 12:32:34 +0000 (13:32 +0100)
commitbd924e8cbd4b73ffb7d707a774c04f7e2cae88ed
tree338d08c708b195acb9c8d6e0bab2e6ea720051a3
parent2ce802f62ba32a7d95748ac92bf351f76affb6ff
smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c

percpu may end up calling vfree() during early boot which in
turn may call on_each_cpu() for TLB flushes.  The function of
on_each_cpu() can be done safely while IRQ is disabled during
early boot but it assumed that the function is always called
with local IRQ enabled which ended up enabling local IRQ
prematurely during boot and triggering a couple of warnings.

This patch updates on_each_cpu() and smp_call_function_many()
such on_each_cpu() can be used safely while
early_boot_irqs_disabled is set.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20110120110713.GC6036@htj.dyndns.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Ingo Molnar <mingo@elte.hu>
kernel/smp.c