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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 /drivers/mtd/devices/block2mtd.c | |
| parent | 714b8171af9c930a59a0da8f6fe50518e70ab035 (diff) | |
| download | op-kernel-dev-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.zip op-kernel-dev-6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2.tar.gz | |
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 'drivers/mtd/devices/block2mtd.c')
| -rw-r--r-- | drivers/mtd/devices/block2mtd.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c index ce47544..fc4cc8b 100644 --- a/drivers/mtd/devices/block2mtd.c +++ b/drivers/mtd/devices/block2mtd.c @@ -40,13 +40,11 @@ struct block2mtd_dev { static LIST_HEAD(blkmtd_device_list); -static struct page* page_read(struct address_space *mapping, int index) +static struct page *page_read(struct address_space *mapping, int index) { - filler_t *filler = (filler_t*)mapping->a_ops->readpage; - return read_cache_page(mapping, index, filler, NULL); + return read_mapping_page(mapping, index, NULL); } - /* erase a specified part of the device */ static int _block2mtd_erase(struct block2mtd_dev *dev, loff_t to, size_t len) { |
