BKL: Remove BKL from afs

The BKL is only used in put_super and fill_super, which are both protected
by the superblocks s_umount rw_semaphore. Therefore it is safe to remove
the BKL entirely.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: linux-afs@lists.infradead.org
Cc: David Howells <dhowells@redhat.com>

fs/afs/super.c

@@ -19,7 +19,6 @@
 #include <linux/mount.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
 #include <linux/parser.h>
@@ -302,15 +301,12 @@ static int afs_fill_super(struct super_block *sb, void *data)
 	struct inode *inode = NULL;
 	int ret;
 
-	lock_kernel();
-
 	_enter("");
 
 	/* allocate a superblock info record */
 	as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
 	if (!as) {
 		_leave(" = -ENOMEM");
-		unlock_kernel();
 		return -ENOMEM;
 	}
 
@@ -344,7 +340,6 @@ static int afs_fill_super(struct super_block *sb, void *data)
 	sb->s_root = root;
 
 	_leave(" = 0");
-	unlock_kernel();
 	return 0;
 
 error_inode:
@@ -358,7 +353,6 @@ static int afs_fill_super(struct super_block *sb, void *data)
 	sb->s_fs_info = NULL;
 
 	_leave(" = %d", ret);
-	unlock_kernel();
 	return ret;
 }
 
@@ -458,12 +452,8 @@ static void afs_put_super(struct super_block *sb)
 
 	_enter("");
 
-	lock_kernel();
-
 	afs_put_volume(as->volume);
 
-	unlock_kernel();
-
 	_leave("");
 }