diff options
| author |   Nick Piggin <npiggin@suse.de> | 2007-05-06 14:49:04 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-07 12:12:51 -0700 |
| commit | 6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2 (patch) | |
| tree | 8bbfe5072279227cc50a941ad4813908082426a1 /fs/nfs | |
| parent | slab: ensure cache_alloc_refill terminates (diff) | |
| download | linux-dev-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.tar.xz linux-dev-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/nfs')
| -rw-r--r-- | fs/nfs/dir.c | 5 | ||||
| -rw-r--r-- | fs/nfs/symlink.c | 6 |
2 files changed, 0 insertions, 11 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index e59fd31c9a22..625d8e5fb39d 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -334,8 +334,6 @@ int find_dirent_page(nfs_readdir_descriptor_t *desc) status = PTR_ERR(page); goto out; } - if (!PageUptodate(page)) - goto read_error; /* NOTE: Someone else may have changed the READDIRPLUS flag */ desc->page = page; @@ -349,9 +347,6 @@ int find_dirent_page(nfs_readdir_descriptor_t *desc) out: dfprintk(DIRCACHE, "NFS: %s: returns %d\n", __FUNCTION__, status); return status; - read_error: - page_cache_release(page); - return -EIO; } /* diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c index f4a0548b9ce8..bc2821331c29 100644 --- a/fs/nfs/symlink.c +++ b/fs/nfs/symlink.c @@ -61,15 +61,9 @@ static void *nfs_follow_link(struct dentry *dentry, struct nameidata *nd) err = page; goto read_failed; } - if (!PageUptodate(page)) { - err = ERR_PTR(-EIO); - goto getlink_read_error; - } nd_set_link(nd, kmap(page)); return page; -getlink_read_error: - page_cache_release(page); read_failed: nd_set_link(nd, err); return NULL; |