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| author | Rik van Riel <riel@redhat.com> | 2010-03-05 22:42:08 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 20:26:26 +0100 |
| commit | 033a64b56aed798991de18d226085dfb1ccd858d (patch) | |
| tree | edf27f0868d1b16e0d1e1e41876b668d4a2f215d /mm | |
| parent | mm: change anon_vma linking to fix multi-process server scalability issue (diff) | |
| download | linux-033a64b56aed798991de18d226085dfb1ccd858d.tar.xz linux-033a64b56aed798991de18d226085dfb1ccd858d.zip | |
rmap: remove obsolete check from __page_check_anon_rmap()
When an anonymous page is inherited from a parent process, the
vma->anon_vma can differ from the page anon_vma. This can trip up
__page_check_anon_rmap, which is indirectly called from do_swap_page().
Remove that obsolete check to prevent an oops.
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/rmap.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index be34094e4595..23ecd0a892df 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -754,9 +754,6 @@ static void __page_check_anon_rmap(struct page *page, * are initially only visible via the pagetables, and the pte is locked * over the call to page_add_new_anon_rmap. */ - struct anon_vma *anon_vma = vma->anon_vma; - anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON; - BUG_ON(page->mapping != (struct address_space *)anon_vma); BUG_ON(page->index != linear_page_index(vma, address)); #endif } |