linux-kernel - [PATCH 09/20] BKL: Remove BKL from ext3_put_super() and ext3

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Message-Id: <1258536293-7762-10-git-send-email-jblunck@suse.de>
Date:	Wed, 18 Nov 2009 10:24:42 +0100
From:	Jan Blunck <jblunck@...e.de>
To:	linux-fsdevel@...r.kernel.org
Cc:	Linux-Kernel Mailinglist <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, jkacur@...hat.com,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Hellwig <hch@...radead.org>,
	Arnd Bergmann <arnd@...db.de>, matthew@....cx,
	Jan Blunck <jblunck@...e.de>, Andreas Dilger <adilger@....com>
Subject: [PATCH 09/20] BKL: Remove BKL from ext3_put_super() and ext3_remount()

The BKL lock is protecting the remounting against a potential call to
ext3_put_super(). This could not happen, since this is protected by the
s_umount rw semaphore of struct super_block.

Therefore I think the BKL is protecting nothing here.

Signed-off-by: Jan Blunck <jblunck@...e.de>
Acked-by: Jan Kara <jack@...e.cz>
---
 fs/ext3/super.c |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 373fc54..d02fbc6 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -398,8 +398,6 @@ static void ext3_put_super (struct super_block * sb)
 	struct ext3_super_block *es = sbi->s_es;
 	int i, err;
 
-	lock_kernel();
-
 	ext3_xattr_put_super(sb);
 	err = journal_destroy(sbi->s_journal);
 	sbi->s_journal = NULL;
@@ -448,8 +446,6 @@ static void ext3_put_super (struct super_block * sb)
 	sb->s_fs_info = NULL;
 	kfree(sbi->s_blockgroup_lock);
 	kfree(sbi);
-
-	unlock_kernel();
 }
 
 static struct kmem_cache *ext3_inode_cachep;
@@ -2497,8 +2493,6 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 	int i;
 #endif
 
-	lock_kernel();
-
 	/* Store the original options */
 	lock_super(sb);
 	old_sb_flags = sb->s_flags;
@@ -2609,7 +2603,6 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 			kfree(old_opts.s_qf_names[i]);
 #endif
 	unlock_super(sb);
-	unlock_kernel();
 	return 0;
 restore_opts:
 	sb->s_flags = old_sb_flags;
@@ -2627,7 +2620,6 @@ restore_opts:
 	}
 #endif
 	unlock_super(sb);
-	unlock_kernel();
 	return err;
 }
 
-- 
1.6.4.2

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