From 6fe6900e1e5b6fa9e5c59aa5061f244fe3f467e2 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Sun, 6 May 2007 14:49:04 -0700 Subject: 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 Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/mtd/devices/block2mtd.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c index ce47544dc120..fc4cc8ba9e29 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) { -- cgit v1.2.3-58-ga151