From 582686915803e34adc8fdcd90bff7ca7f6a42221 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 24 Jun 2011 14:29:40 -0400 Subject: fat: remove i_alloc_sem abuse Add a new rw_semaphore to protect bmap against truncate. Previous i_alloc_sem was abused for this, but it's going away in this series. Note that we can't simply use i_mutex, given that the swapon code calls ->bmap under it. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro --- fs/fat/fat.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/fat/fat.h') diff --git a/fs/fat/fat.h b/fs/fat/fat.h index 8276cc282dec..a975b4147e91 100644 --- a/fs/fat/fat.h +++ b/fs/fat/fat.h @@ -109,6 +109,7 @@ struct msdos_inode_info { int i_attrs; /* unused attribute bits */ loff_t i_pos; /* on-disk position of directory entry or 0 */ struct hlist_node i_fat_hash; /* hash by i_location */ + struct rw_semaphore truncate_lock; /* protect bmap against truncate */ struct inode vfs_inode; }; -- cgit v1.2.3