HWPOISON: Use get_user_page_fast in hwpoison madvise

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The previous version didn't take the mmap_sem before calling gup(),
which is racy.

Use get_user_pages_fast() instead which doesn't need any locks.
This is also faster of course, but then it doesn't really matter
because this is just a testing path.

Based on report from Nick Piggin.
Cc: npiggin@suse.de

Signed-off-by: Andi Kleen <ak@linux.intel.com>

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Andi Kleen 2009-12-16 12:20:00 +01:00 • committed by Andi Kleen

parent 1bfe5febe3

commit d15f107d97

1 changed files with 1 additions and 2 deletions

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mm/madvise.c

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