BKL: Remove BKL from fat
The lock_kernel in fat_put_super is not needed because
it only protects the super block itself and we know that
no other thread can reach it because we are about to
kfree the object.
In the two fill_super functions, this converts the locking
to use lock_super like elsewhere in the fat code. This
is probably not needed either, but is consistent and puts
us on the safe side.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Jan Blunck <jblunck@infradead.org>
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 8300580..ad6998a 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -14,7 +14,6 @@
#include <linux/init.h>
#include <linux/time.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
#include <linux/seq_file.h>
#include <linux/pagemap.h>
#include <linux/mpage.h>
@@ -489,8 +488,6 @@
{
struct msdos_sb_info *sbi = MSDOS_SB(sb);
- lock_kernel();
-
if (sb->s_dirt)
fat_write_super(sb);
@@ -504,8 +501,6 @@
sb->s_fs_info = NULL;
kfree(sbi);
-
- unlock_kernel();
}
static struct kmem_cache *fat_inode_cachep;
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index e2b0b97..bbca5c1 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -9,7 +9,6 @@
#include <linux/module.h>
#include <linux/time.h>
#include <linux/buffer_head.h>
-#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/* Characters that are undesirable in an MS-DOS file name */
@@ -663,16 +662,16 @@
{
int res;
- lock_kernel();
+ lock_super(sb);
res = fat_fill_super(sb, data, silent, &msdos_dir_inode_operations, 0);
if (res) {
- unlock_kernel();
+ unlock_super(sb);
return res;
}
sb->s_flags |= MS_NOATIME;
sb->s_root->d_op = &msdos_dentry_operations;
- unlock_kernel();
+ unlock_super(sb);
return 0;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 9006ad9..6f0f6c9 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -21,7 +21,6 @@
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include <linux/namei.h>
-#include <linux/smp_lock.h> /* For lock_kernel() */
#include "fat.h"
/*
@@ -1056,10 +1055,10 @@
{
int res;
- lock_kernel();
+ lock_super(sb);
res = fat_fill_super(sb, data, silent, &vfat_dir_inode_operations, 1);
if (res) {
- unlock_kernel();
+ unlock_super(sb);
return res;
}
@@ -1068,7 +1067,7 @@
else
sb->s_root->d_op = &vfat_dentry_ops;
- unlock_kernel();
+ unlock_super(sb);
return 0;
}