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 --- fs/partitions/check.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'fs/partitions') diff --git a/fs/partitions/check.c b/fs/partitions/check.c index f01572fca02f..6b9dae3f0e6c 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -569,9 +569,6 @@ unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p) page = read_mapping_page(mapping, (pgoff_t)(n >> (PAGE_CACHE_SHIFT-9)), NULL); if (!IS_ERR(page)) { - wait_on_page_locked(page); - if (!PageUptodate(page)) - goto fail; if (PageError(page)) goto fail; p->v = page; -- cgit v1.2.3-58-ga151