[PATCH] Remove superfluous lock_super() in extN xattr code

lock_super() is unnecessary for setting super-block feature flags.  Use the
provided *_SET_COMPAT_FEATURE() macros as well.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 3 insertions, 12 deletions

diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index af52a7f8b291..247efd0b51d6 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -342,12 +342,9 @@ static void ext2_xattr_update_super_block(struct super_block *sb)
         if (EXT2_HAS_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR))
                 return;
 
-        lock_super(sb);
-        EXT2_SB(sb)->s_es->s_feature_compat |=
-                cpu_to_le32(EXT2_FEATURE_COMPAT_EXT_ATTR);
+        EXT2_SET_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR);
         sb->s_dirt = 1;
         mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
-        unlock_super(sb);
 }
 
 /*
diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index f86f2482f01d..99857a400f4b 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -459,14 +459,11 @@ static void ext3_xattr_update_super_block(handle_t *handle,
         if (EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_EXT_ATTR))
                 return;
 
-        lock_super(sb);
         if (ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh) == 0) {
-                EXT3_SB(sb)->s_es->s_feature_compat |=
-                        cpu_to_le32(EXT3_FEATURE_COMPAT_EXT_ATTR);
+                EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_EXT_ATTR);
                 sb->s_dirt = 1;
                 ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
         }
-        unlock_super(sb);
 }
 
 /*
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 63233cd946a7..dc969c357aa1 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -459,14 +459,11 @@ static void ext4_xattr_update_super_block(handle_t *handle,
         if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR))
                 return;
 
-        lock_super(sb);
         if (ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh) == 0) {
-                EXT4_SB(sb)->s_es->s_feature_compat |=
-                        cpu_to_le32(EXT4_FEATURE_COMPAT_EXT_ATTR);
+                EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_EXT_ATTR);
                 sb->s_dirt = 1;
                 ext4_journal_dirty_metadata(handle, EXT4_SB(sb)->s_sbh);
         }
-        unlock_super(sb);
 }
 
 /*