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| author | Matthew Wilcox | 2019-03-06 00:44:08 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2019-03-06 06:07:16 +0100 |
| commit | 14ef1fc72a3e86cea6498193c5e04b4619cb8622 (patch) | |
| tree | 51dca5e31d99fc92626bfe7c3eebfb4543201554 /mm/swap_state.c | |
| parent | mm/memcontrol.c: use struct_size() in kmalloc() (diff) | |
| download | kernel-qcow2-linux-14ef1fc72a3e86cea6498193c5e04b4619cb8622.tar.gz kernel-qcow2-linux-14ef1fc72a3e86cea6498193c5e04b4619cb8622.tar.xz kernel-qcow2-linux-14ef1fc72a3e86cea6498193c5e04b4619cb8622.zip | |
mm/filemap.c: remove redundant test from find_get_pages_contig
After we establish a reference on the page, we check the pointer
continues to be in the correct position in i_pages. Checking
page->index afterwards is unnecessary; if it were to change, then the
pointer to it from the page cache would also move. The check used to be
done before grabbing a reference on the page which was racy (see commit
9cbb4cb21b19f ("mm: find_get_pages_contig fixlet")), but nobody noticed
that moving the check after grabbing the reference was redundant.
Link: http://lkml.kernel.org/r/20190107200224.13260-1-willy@infradead.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap_state.c')
0 files changed, 0 insertions, 0 deletions