BKL: Remove BKL from JFS

The BKL is only used in put_super, fill_super and remount_fs that are all
three protected by the superblocks s_umount rw_semaphore. Therefore it is
safe to remove the BKL entirely.

Signed-off-by: Jan Blunck <jblunck@infradead.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index eb31f67..68eee2b 100644 (file)
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -33,7 +33,6 @@
 #include <linux/slab.h>
 #include <asm/uaccess.h>
 #include <linux/seq_file.h>
-#include <linux/smp_lock.h>
 
 #include "jfs_incore.h"
 #include "jfs_filsys.h"
@@ -176,8 +175,6 @@ static void jfs_put_super(struct super_block *sb)
 
        dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
 
-       lock_kernel();
-
        rc = jfs_umount(sb);
        if (rc)
                jfs_err("jfs_umount failed with return code %d", rc);
@@ -188,8 +185,6 @@ static void jfs_put_super(struct super_block *sb)
        iput(sbi->direct_inode);
 
        kfree(sbi);
-
-       unlock_kernel();
 }
 
 enum {
@@ -369,19 +364,16 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
        if (!parse_options(data, sb, &newLVSize, &flag)) {
                return -EINVAL;
        }
-       lock_kernel();
+
        if (newLVSize) {
                if (sb->s_flags & MS_RDONLY) {
                        printk(KERN_ERR
                  "JFS: resize requires volume to be mounted read-write\n");
-                       unlock_kernel();
                        return -EROFS;
                }
                rc = jfs_extendfs(sb, newLVSize, 0);
-               if (rc) {
-                       unlock_kernel();
+               if (rc)
                        return rc;
-               }
        }
 
        if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
@@ -397,36 +389,30 @@ static int jfs_remount(struct super_block *sb, int *flags, char *data)
                /* mark the fs r/w for quota activity */
                sb->s_flags &= ~MS_RDONLY;
 
-               unlock_kernel();
                dquot_resume(sb, -1);
                return ret;
        }
        if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
                rc = dquot_suspend(sb, -1);
                if (rc < 0) {
-                       unlock_kernel();
                        return rc;
                }
                rc = jfs_umount_rw(sb);
                JFS_SBI(sb)->flag = flag;
-               unlock_kernel();
                return rc;
        }
        if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
                if (!(sb->s_flags & MS_RDONLY)) {
                        rc = jfs_umount_rw(sb);
-                       if (rc) {
-                               unlock_kernel();
+                       if (rc)
                                return rc;
-                       }
+
                        JFS_SBI(sb)->flag = flag;
                        ret = jfs_mount_rw(sb, 1);
-                       unlock_kernel();
                        return ret;
                }
        JFS_SBI(sb)->flag = flag;
 
-       unlock_kernel();
        return 0;
 }
 
@@ -438,20 +424,15 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
        s64 newLVSize = 0;
        int flag, ret = -EINVAL;
 
-       lock_kernel();
-
        jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
 
-       if (!new_valid_dev(sb->s_bdev->bd_dev)) {
-               unlock_kernel();
+       if (!new_valid_dev(sb->s_bdev->bd_dev))
                return -EOVERFLOW;
-       }
 
        sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
-       if (!sbi) {
-               unlock_kernel();
+       if (!sbi)
                return -ENOMEM;
-       }
+
        sb->s_fs_info = sbi;
        sbi->sb = sb;
        sbi->uid = sbi->gid = sbi->umask = -1;
@@ -548,7 +529,6 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
 #endif
        sb->s_time_gran = 1;
-       unlock_kernel();
        return 0;
 
 out_no_root:
@@ -571,7 +551,6 @@ out_unload:
                unload_nls(sbi->nls_tab);
 out_kfree:
        kfree(sbi);
-       unlock_kernel();
        return ret;
 }