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OpenCloudOS-Kernel
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BKL: Remove BKL from NTFS 

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 13:25:33 +01:00 committed by Arnd Bergmann
parent d6d4c19c5f
commit efdffb5403
1 changed files with 2 additions and 27 deletions
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29
fs/ntfs/super.c
View File

@ -30,7 +30,6 @@
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/moduleparam.h>
#include <linux/smp_lock.h>
#include <linux/bitmap.h>
#include "sysctl.h"
@ -445,7 +444,6 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_debug("Entering with remount options string: %s", opt);
lock_kernel();
#ifndef NTFS_RW
/* For read-only compiled driver, enforce read-only flag. */
*flags |= MS_RDONLY;
@ -469,18 +467,15 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
if (NVolErrors(vol)) {
ntfs_error(sb, "Volume has errors and is read-only%s",
es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_IS_DIRTY) {
ntfs_error(sb, "Volume is dirty and read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) {
ntfs_error(sb, "Volume has been modified by chkdsk "
"and is read-only%s", es);
unlock_kernel();
return -EROFS;
}
if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) {
@ -488,13 +483,11 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
"(0x%x) and is read-only%s",
(unsigned)le16_to_cpu(vol->vol_flags),
es);
unlock_kernel();
return -EROFS;
}
if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) {
ntfs_error(sb, "Failed to set dirty bit in volume "
"information flags%s", es);
unlock_kernel();
return -EROFS;
}
#if 0
@ -514,21 +507,18 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
ntfs_error(sb, "Failed to empty journal $LogFile%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_mark_quotas_out_of_date(vol)) {
ntfs_error(sb, "Failed to mark quotas out of date%s",
es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
if (!ntfs_stamp_usnjrnl(vol)) {
ntfs_error(sb, "Failed to stamp transation log "
"($UsnJrnl)%s", es);
NVolSetErrors(vol);
unlock_kernel();
return -EROFS;
}
} else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
@ -544,11 +534,9 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
// TODO: Deal with *flags.
if (!parse_options(vol, opt)) {
unlock_kernel();
if (!parse_options(vol, opt))
return -EINVAL;
}
unlock_kernel();
ntfs_debug("Done.");
return 0;
}
@ -2261,8 +2249,6 @@ static void ntfs_put_super(struct super_block *sb)
ntfs_debug("Entering.");
lock_kernel();
#ifdef NTFS_RW
/*
* Commit all inodes while they are still open in case some of them
@ -2433,8 +2419,6 @@ static void ntfs_put_super(struct super_block *sb)
sb->s_fs_info = NULL;
kfree(vol);
unlock_kernel();
}
/**
@ -2732,8 +2716,6 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
struct inode *tmp_ino;
int blocksize, result;
lock_kernel();
/*
* We do a pretty difficult piece of bootstrap by reading the
* MFT (and other metadata) from disk into memory. We'll only
@ -2757,7 +2739,6 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
ntfs_error(sb, "Allocation of NTFS volume structure "
"failed. Aborting mount...");
lockdep_on();
unlock_kernel();
return -ENOMEM;
}
/* Initialize ntfs_volume structure. */
@ -2775,8 +2756,6 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
init_rwsem(&vol->mftbmp_lock);
init_rwsem(&vol->lcnbmp_lock);
unlock_kernel();
/* By default, enable sparse support. */
NVolSetSparseEnabled(vol);
@ -2943,9 +2922,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
}
mutex_unlock(&ntfs_lock);
sb->s_export_op = &ntfs_export_ops;
lock_kernel();
lockdep_on();
unlock_kernel();
return 0;
}
ntfs_error(sb, "Failed to allocate root directory.");
@ -3061,12 +3038,10 @@ iput_tmp_ino_err_out_now:
}
/* Errors at this stage are irrelevant. */
err_out_now:
lock_kernel();
sb->s_fs_info = NULL;
kfree(vol);
ntfs_debug("Failed, returning -EINVAL.");
lockdep_on();
unlock_kernel();
return -EINVAL;
}