adfs: remove the big kernel lock

According to Russell King, adfs was written to not require the big
kernel lock, and all inode updates are done under adfs_dir_lock.

All other metadata in adfs is read-only and does not require locking.
The use of the BKL is the result of various pushdowns from the VFS
operations.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Stuart Swales <stuart.swales.croftnuisk@gmail.com>

1 files changed, 1 insertions, 12 deletions

diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 2d7954049fbe..06d7388b477b 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -14,7 +14,6 @@
 #include <linux/mount.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
 #include <linux/statfs.h>
 #include "adfs.h"
 #include "dir_f.h"
@@ -120,15 +119,11 @@ static void adfs_put_super(struct super_block *sb)
         int i;
         struct adfs_sb_info *asb = ADFS_SB(sb);
 
-        lock_kernel();
-
         for (i = 0; i < asb->s_map_size; i++)
                 brelse(asb->s_map[i].dm_bh);
         kfree(asb->s_map);
         kfree(asb);
         sb->s_fs_info = NULL;
-
-        unlock_kernel();
 }
 
 static int adfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
@@ -359,15 +354,11 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
         struct adfs_sb_info *asb;
         struct inode *root;
 
-        lock_kernel();
-
         sb->s_flags |= MS_NODIRATIME;
 
         asb = kzalloc(sizeof(*asb), GFP_KERNEL);
-        if (!asb) {
-                unlock_kernel();
+        if (!asb)
                 return -ENOMEM;
-        }
         sb->s_fs_info = asb;
 
         /* set default options */
@@ -485,7 +476,6 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
                 adfs_error(sb, "get root inode failed\n");
                 goto error;
         }
-        unlock_kernel();
         return 0;
 
 error_free_bh:
@@ -493,7 +483,6 @@ error_free_bh:
 error:
         sb->s_fs_info = NULL;
         kfree(asb);
-        unlock_kernel();
         return -EINVAL;
 }