From 3a95ea1155c5d44aa58dde2f64f0ddafe27fd1fb Mon Sep 17 00:00:00 2001 From: OGAWA Hirofumi Date: Thu, 12 Mar 2009 02:03:23 +0900 Subject: [PATCH] Fix _fat_bmap() locking On swapon() path, it has already i_mutex. So, this uses i_alloc_sem instead of it. Signed-off-by: OGAWA Hirofumi Reported-by: Laurent GUERBY Signed-off-by: Linus Torvalds --- fs/fat/inode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 6b74d09adbe5..de0004fe6e00 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -202,9 +202,9 @@ static sector_t _fat_bmap(struct address_space *mapping, sector_t block) sector_t blocknr; /* fat_get_cluster() assumes the requested blocknr isn't truncated. */ - mutex_lock(&mapping->host->i_mutex); + down_read(&mapping->host->i_alloc_sem); blocknr = generic_block_bmap(mapping, block, fat_get_block); - mutex_unlock(&mapping->host->i_mutex); + up_read(&mapping->host->i_alloc_sem); return blocknr; } -- 2.34.1