luck/tmp_suning_uos_patched
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BKL: Remove BKL from JFS

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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>
This commit is contained in:
Jan Blunck 2010-02-24 13:25:31 +01:00 committed by Arnd Bergmann
parent 8526fb37c9
commit 22b26db6f8
1 changed files with 7 additions and 28 deletions
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35
fs/jfs/super.c
View File

@ -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 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
unload_nls(sbi->nls_tab);
out_kfree:
kfree(sbi);
unlock_kernel();
return ret;
}