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| author | Nick Piggin <npiggin@suse.de> | 2007-10-16 01:24:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:53 -0700 |
| commit | b55ed816235cf41c29159d22a4cdeec7deb5821c (patch) | |
| tree | 73245c1da2c5352c526d4d25f02e69943b4b0b15 /lib | |
| parent | 45726cb43d11b288c58243a26010f397054222f0 (diff) | |
| download | blackbird-op-linux-b55ed816235cf41c29159d22a4cdeec7deb5821c.tar.gz blackbird-op-linux-b55ed816235cf41c29159d22a4cdeec7deb5821c.zip | |
mm: clarify __add_to_swap_cache locking
__add_to_swap_cache unconditionally sets the page locked, which can be a bit
alarming to the unsuspecting reader: in the code paths where the page is
visible to other CPUs, the page should be (and is) already locked.
Instead, just add a check to ensure the page is locked here, and teach the one
path relying on the old behaviour to call SetPageLocked itself.
[hugh@veritas.com: locking fix]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions
