linux-ext4 - [patch 152/354] Remove superfluous lock

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Message-Id: <200612070436.kB74aGlp029434@shell0.pdx.osdl.net>
Date:	Wed, 06 Dec 2006 20:36:16 -0800
From:	akpm@...l.org
To:	torvalds@...l.org
Cc:	akpm@...l.org, agruen@...e.de, linux-ext4@...r.kernel.org
Subject: [patch 152/354] Remove superfluous lock_super() in extN xattr code

From: Andreas Gruenbacher <agruen@...e.de>

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@...e.de>
Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...l.org>
---

 fs/ext2/xattr.c |    5 +----
 fs/ext3/xattr.c |    5 +----
 fs/ext4/xattr.c |    5 +----
 3 files changed, 3 insertions(+), 12 deletions(-)

diff -puN fs/ext2/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code fs/ext2/xattr.c
--- a/fs/ext2/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code
+++ a/fs/ext2/xattr.c
@@ -342,12 +342,9 @@ static void ext2_xattr_update_super_bloc
 	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 -puN fs/ext3/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code fs/ext3/xattr.c
--- a/fs/ext3/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code
+++ a/fs/ext3/xattr.c
@@ -459,14 +459,11 @@ static void ext3_xattr_update_super_bloc
 	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 -puN fs/ext4/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code fs/ext4/xattr.c
--- a/fs/ext4/xattr.c~remove-superfluous-lock_super-in-ext2-and-ext3-xattr-code
+++ a/fs/ext4/xattr.c
@@ -459,14 +459,11 @@ static void ext4_xattr_update_super_bloc
 	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);
 }
 
 /*
_
-
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