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| author | Nick Piggin <npiggin@suse.de> | 2007-05-06 23:49:04 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 21:12:51 +0200 |
| commit | 6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2 (patch) | |
| tree | 8bbfe5072279227cc50a941ad4813908082426a1 /fs/sysv/dir.c | |
| parent | slab: ensure cache_alloc_refill terminates (diff) | |
| download | linux-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/sysv/dir.c')
| -rw-r--r-- | fs/sysv/dir.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c index ebf7007fa161..e566b387fcf9 100644 --- a/fs/sysv/dir.c +++ b/fs/sysv/dir.c @@ -54,17 +54,9 @@ static struct page * dir_get_page(struct inode *dir, unsigned long n) { struct address_space *mapping = dir->i_mapping; struct page *page = read_mapping_page(mapping, n, NULL); - if (!IS_ERR(page)) { - wait_on_page_locked(page); + if (!IS_ERR(page)) kmap(page); - if (!PageUptodate(page)) - goto fail; - } return page; - -fail: - dir_put_page(page); - return ERR_PTR(-EIO); } static int sysv_readdir(struct file * filp, void * dirent, filldir_t filldir) |