BKL: Remove BKL from NILFS2
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/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index f90a33d..0442ee3 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -22,7 +22,6 @@
#include <linux/fs.h>
#include <linux/wait.h>
-#include <linux/smp_lock.h> /* lock_kernel(), unlock_kernel() */
#include <linux/slab.h>
#include <linux/capability.h> /* capable() */
#include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 0d573c2..9f4913f 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -45,7 +45,6 @@
#include <linux/parser.h>
#include <linux/random.h>
#include <linux/crc32.h>
-#include <linux/smp_lock.h>
#include <linux/vfs.h>
#include <linux/writeback.h>
#include <linux/kobject.h>
@@ -342,8 +341,6 @@
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct the_nilfs *nilfs = sbi->s_nilfs;
- lock_kernel();
-
nilfs_detach_segment_constructor(sbi);
if (!(sb->s_flags & MS_RDONLY)) {
@@ -361,8 +358,6 @@
sbi->s_super = NULL;
sb->s_fs_info = NULL;
nilfs_put_sbinfo(sbi);
-
- unlock_kernel();
}
static int nilfs_sync_fs(struct super_block *sb, int wait)
@@ -949,8 +944,6 @@
struct nilfs_mount_options old_opts;
int was_snapshot, err;
- lock_kernel();
-
down_write(&nilfs->ns_super_sem);
old_sb_flags = sb->s_flags;
old_opts.mount_opt = sbi->s_mount_opt;
@@ -1024,7 +1017,6 @@
}
out:
up_write(&nilfs->ns_super_sem);
- unlock_kernel();
return 0;
restore_opts:
@@ -1032,7 +1024,6 @@
sbi->s_mount_opt = old_opts.mount_opt;
sbi->s_snapshot_cno = old_opts.snapshot_cno;
up_write(&nilfs->ns_super_sem);
- unlock_kernel();
return err;
}
@@ -1113,12 +1104,9 @@
if (!(flags & MS_RDONLY))
mode |= FMODE_WRITE;
- lock_kernel();
sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type);
- if (IS_ERR(sd.bdev)) {
- unlock_kernel();
+ if (IS_ERR(sd.bdev))
return PTR_ERR(sd.bdev);
- }
/*
* To get mount instance using sget() vfs-routine, NILFS needs
@@ -1201,7 +1189,6 @@
if (need_to_close)
close_bdev_exclusive(sd.bdev, mode);
simple_set_mnt(mnt, s);
- unlock_kernel();
return 0;
failed_unlock:
@@ -1209,8 +1196,6 @@
put_nilfs(nilfs);
failed:
close_bdev_exclusive(sd.bdev, mode);
-
- unlock_kernel();
return err;
cancel_new:
@@ -1223,7 +1208,6 @@
* We must finish all post-cleaning before this call;
* put_nilfs() needs the block device.
*/
- unlock_kernel();
return err;
}