[PATCH] convert ext3's truncate_sem to a mutex

ext3's truncate_sem is always released in the same function it's taken
and it otherwise is a mutex as well..

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/ext3_fs_i.h b/include/linux/ext3_fs_i.h
index e71dd98dbcae..7abf90147180 100644
--- a/include/linux/ext3_fs_i.h
+++ b/include/linux/ext3_fs_i.h
@@ -19,6 +19,7 @@
 #include <linux/rwsem.h>
 #include <linux/rbtree.h>
 #include <linux/seqlock.h>
+#include <linux/mutex.h>
 
 struct ext3_reserve_window {
         __u32                   _rsv_start;     /* First byte reserved */
@@ -122,16 +123,16 @@ struct ext3_inode_info {
         __u16 i_extra_isize;
 
         /*
-         * truncate_sem is for serialising ext3_truncate() against
+         * truncate_mutex is for serialising ext3_truncate() against
          * ext3_getblock().  In the 2.4 ext2 design, great chunks of inode's
          * data tree are chopped off during truncate. We can't do that in
          * ext3 because whenever we perform intermediate commits during
          * truncate, the inode and all the metadata blocks *must* be in a
          * consistent state which allows truncation of the orphans to restart
          * during recovery.  Hence we must fix the get_block-vs-truncate race
-         * by other means, so we have truncate_sem.
+         * by other means, so we have truncate_mutex.
          */
-        struct semaphore truncate_sem;
+        struct mutex truncate_mutex;
         struct inode vfs_inode;
 };