percpu: fix too lazy vunmap cache flushing

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In pcpu_unmap(), flushing virtual cache on vunmap can't be delayed as
the page is going to be returned to the page allocator.  Only TLB
flushing can be put off such that vmalloc code can handle it lazily.
Fix it.

[ Impact: fix subtle virtual cache flush bug ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Tejun Heo 2009-06-22 11:56:23 +09:00

parent f234012f52

commit 85ae87c1ad

1 changed files with 5 additions and 6 deletions

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mm/percpu.c

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