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adfs: remove the big kernel lock

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According to Russell King, adfs was written to not require the big
kernel lock, and all inode updates are done under adfs_dir_lock.

All other metadata in adfs is read-only and does not require locking.
The use of the BKL is the result of various pushdowns from the VFS
operations.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Stuart Swales <stuart.swales.croftnuisk@gmail.com>
This commit is contained in:
Arnd Bergmann
2011-01-22 20:05:05 +01:00
parent f5412be599
commit 4688a066ec
4 changed files with 1 additions and 25 deletions
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13
fs/adfs/super.c
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@ -14,7 +14,6 @@
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/statfs.h>
#include "adfs.h"
#include "dir_f.h"
@ -120,15 +119,11 @@ static void adfs_put_super(struct super_block *sb)
int i;
struct adfs_sb_info *asb = ADFS_SB(sb);
lock_kernel();
for (i = 0; i < asb->s_map_size; i++)
brelse(asb->s_map[i].dm_bh);
kfree(asb->s_map);
kfree(asb);
sb->s_fs_info = NULL;
unlock_kernel();
}
static int adfs_show_options(struct seq_file *seq, struct vfsmount *mnt)
@ -359,15 +354,11 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
struct adfs_sb_info *asb;
struct inode *root;
lock_kernel();
sb->s_flags |= MS_NODIRATIME;
asb = kzalloc(sizeof(*asb), GFP_KERNEL);
if (!asb) {
unlock_kernel();
if (!asb)
return -ENOMEM;
}
sb->s_fs_info = asb;
/* set default options */
@ -485,7 +476,6 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
adfs_error(sb, "get root inode failed\n");
goto error;
}
unlock_kernel();
return 0;
error_free_bh:
@ -493,7 +483,6 @@ error_free_bh:
error:
sb->s_fs_info = NULL;
kfree(asb);
unlock_kernel();
return -EINVAL;
}