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authorNick Piggin <npiggin@suse.de>2007-05-06 23:49:04 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 21:12:51 +0200
commit6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2 (patch)
tree8bbfe5072279227cc50a941ad4813908082426a1 /fs/partitions
parentslab: ensure cache_alloc_refill terminates (diff)
downloadlinux-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.tar.xz
linux-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.zip
mm: make read_cache_page synchronous
Ensure pages are uptodate after returning from read_cache_page, which allows us to cut out most of the filesystem-internal PageUptodate calls. I didn't have a great look down the call chains, but this appears to fixes 7 possible use-before uptodate in hfs, 2 in hfsplus, 1 in jfs, a few in ecryptfs, 1 in jffs2, and a possible cleared data overwritten with readpage in block2mtd. All depending on whether the filler is async and/or can return with a !uptodate page. 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>
Diffstat (limited to 'fs/partitions')
-rw-r--r--fs/partitions/check.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index f01572fca02f..6b9dae3f0e6c 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -569,9 +569,6 @@ unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)),
NULL);
if (!IS_ERR(page)) {
- wait_on_page_locked(page);
- if (!PageUptodate(page))
- goto fail;
if (PageError(page))
goto fail;
p->v = page;