tree f14bf796d087e130452a2e2457c75eb1eca27483
parent ea125892a17f43919c726777ed1e4929d41e7984
author Nick Piggin <npiggin@suse.de> 1179378681 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1179404586 -0700

mm: more rmap checking

Re-introduce rmap verification patches that Hugh removed when he removed
PG_map_lock. PG_map_lock actually isn't needed to synchronise access to
anonymous pages, because PG_locked and PTL together already do.

These checks were important in discovering and fixing a rare rmap corruption
in SLES9.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>