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/ntfs/attrib.c | 18 ++---------------- 1 file changed, 2 insertions(+), 16 deletions(-) (limited to 'fs/ntfs/attrib.c') diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c index 7659cc192995..1c08fefe487a 100644 --- a/fs/ntfs/attrib.c +++ b/fs/ntfs/attrib.c @@ -2532,14 +2532,7 @@ int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, const u8 val) page = read_mapping_page(mapping, idx, NULL); if (IS_ERR(page)) { ntfs_error(vol->sb, "Failed to read first partial " - "page (sync error, index 0x%lx).", idx); - return PTR_ERR(page); - } - wait_on_page_locked(page); - if (unlikely(!PageUptodate(page))) { - ntfs_error(vol->sb, "Failed to read first partial page " - "(async error, index 0x%lx).", idx); - page_cache_release(page); + "page (error, index 0x%lx).", idx); return PTR_ERR(page); } /* @@ -2602,14 +2595,7 @@ int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, const u8 val) page = read_mapping_page(mapping, idx, NULL); if (IS_ERR(page)) { ntfs_error(vol->sb, "Failed to read last partial page " - "(sync error, index 0x%lx).", idx); - return PTR_ERR(page); - } - wait_on_page_locked(page); - if (unlikely(!PageUptodate(page))) { - ntfs_error(vol->sb, "Failed to read last partial page " - "(async error, index 0x%lx).", idx); - page_cache_release(page); + "(error, index 0x%lx).", idx); return PTR_ERR(page); } kaddr = kmap_atomic(page, KM_USER0); -- cgit v1.2.3