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authorChristoph Hellwig <hch@infradead.org>2011-06-24 22:29:40 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-21 04:47:44 +0400
commit582686915803e34adc8fdcd90bff7ca7f6a42221 (patch)
tree5a522cb6dbc41eaac987dbf15a2cbae35b2544cc /fs/fat/fat.h
parent8c5dc70aae29d2571c0f461d69b37e4e6e01ff4c (diff)
downloadlinux-582686915803e34adc8fdcd90bff7ca7f6a42221.tar.xz
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 <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/fat/fat.h')
-rw-r--r--fs/fat/fat.h1
1 files changed, 1 insertions, 0 deletions
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;
};