x86: prevent dereferencing non-allocated per_cpu variables

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'for_each_possible_cpu(i)' when there's a _remote possibility_ of
dereferencing a non-allocated per_cpu variable involved.

All files except mm/vmstat.c are x86 arch.

Thanks to pageexec@freemail.hu for pointing this out.

Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <pageexec@freemail.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

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Mike Travis 2008-01-30 13:30:55 +01:00 • committed by Ingo Molnar

parent 0fa376e027

commit 7bf0c23ed2

3 changed files with 6 additions and 6 deletions

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4

arch/x86/kernel/smp_32.c

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4

arch/x86/kernel/smpboot_32.c

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4

arch/x86/xen/smp.c

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