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| 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/ufs | |
| parent | 714b8171af9c930a59a0da8f6fe50518e70ab035 (diff) | |
| download | kernel_samsung_smdk4412-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.tar.gz kernel_samsung_smdk4412-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.tar.bz2 kernel_samsung_smdk4412-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.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/ufs')
| -rw-r--r-- | fs/ufs/dir.c | 6 | ||||
| -rw-r--r-- | fs/ufs/util.c | 6 |
2 files changed, 3 insertions, 9 deletions
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c index 4890ddf1518..4fb8b2e077e 100644 --- a/fs/ufs/dir.c +++ b/fs/ufs/dir.c @@ -180,13 +180,9 @@ fail: static struct page *ufs_get_page(struct inode *dir, unsigned long n) { struct address_space *mapping = dir->i_mapping; - struct page *page = read_cache_page(mapping, n, - (filler_t*)mapping->a_ops->readpage, NULL); + struct page *page = read_mapping_page(mapping, n, NULL); if (!IS_ERR(page)) { - wait_on_page_locked(page); kmap(page); - if (!PageUptodate(page)) - goto fail; if (!PageChecked(page)) ufs_check_page(page); if (PageError(page)) diff --git a/fs/ufs/util.c b/fs/ufs/util.c index 17437574f79..84357f1ff0e 100644 --- a/fs/ufs/util.c +++ b/fs/ufs/util.c @@ -251,13 +251,11 @@ struct page *ufs_get_locked_page(struct address_space *mapping, page = find_lock_page(mapping, index); if (!page) { - page = read_cache_page(mapping, index, - (filler_t*)mapping->a_ops->readpage, - NULL); + page = read_mapping_page(mapping, index, NULL); if (IS_ERR(page)) { printk(KERN_ERR "ufs_change_blocknr: " - "read_cache_page error: ino %lu, index: %lu\n", + "read_mapping_page error: ino %lu, index: %lu\n", mapping->host->i_ino, index); goto out; } |