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affs: convert s_bmlock into a mutex

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The semaphore s_bmlock is used as a mutex.  Convert it to the mutex API.

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2008-07-25 19:44:51 -07:00 committed by Linus Torvalds
parent 1956a96de4
commit 7d135a5d50
3 changed files with 12 additions and 11 deletions
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3
fs/affs/affs.h
View file

@ -2,6 +2,7 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/amigaffs.h>
#include <linux/mutex.h>
/* AmigaOS allows file names with up to 30 characters length.
* Names longer than that will be silently truncated. If you
@ -98,7 +99,7 @@ struct affs_sb_info {
gid_t s_gid; /* gid to override */
umode_t s_mode; /* mode to override */
struct buffer_head *s_root_bh; /* Cached root block. */
struct semaphore s_bmlock; /* Protects bitmap access. */
struct mutex s_bmlock; /* Protects bitmap access. */
struct affs_bm_info *s_bitmap; /* Bitmap infos. */
u32 s_bmap_count; /* # of bitmap blocks. */
u32 s_bmap_bits; /* # of bits in one bitmap blocks */

18
fs/affs/bitmap.c
View file

@ -45,14 +45,14 @@ affs_count_free_blocks(struct super_block *sb)
if (sb->s_flags & MS_RDONLY)
return 0;
down(&AFFS_SB(sb)->s_bmlock);
mutex_lock(&AFFS_SB(sb)->s_bmlock);
bm = AFFS_SB(sb)->s_bitmap;
free = 0;
for (i = AFFS_SB(sb)->s_bmap_count; i > 0; bm++, i--)
free += bm->bm_free;
up(&AFFS_SB(sb)->s_bmlock);
mutex_unlock(&AFFS_SB(sb)->s_bmlock);
return free;
}
@ -76,7 +76,7 @@ affs_free_block(struct super_block *sb, u32 block)
bit = blk % sbi->s_bmap_bits;
bm = &sbi->s_bitmap[bmap];
down(&sbi->s_bmlock);
mutex_lock(&sbi->s_bmlock);
bh = sbi->s_bmap_bh;
if (sbi->s_last_bmap != bmap) {
@ -105,19 +105,19 @@ affs_free_block(struct super_block *sb, u32 block)
sb->s_dirt = 1;
bm->bm_free++;
up(&sbi->s_bmlock);
mutex_unlock(&sbi->s_bmlock);
return;
err_free:
affs_warning(sb,"affs_free_block","Trying to free block %u which is already free", block);
up(&sbi->s_bmlock);
mutex_unlock(&sbi->s_bmlock);
return;
err_bh_read:
affs_error(sb,"affs_free_block","Cannot read bitmap block %u", bm->bm_key);
sbi->s_bmap_bh = NULL;
sbi->s_last_bmap = ~0;
up(&sbi->s_bmlock);
mutex_unlock(&sbi->s_bmlock);
return;
err_range:
@ -168,7 +168,7 @@ affs_alloc_block(struct inode *inode, u32 goal)
bmap = blk / sbi->s_bmap_bits;
bm = &sbi->s_bitmap[bmap];
down(&sbi->s_bmlock);
mutex_lock(&sbi->s_bmlock);
if (bm->bm_free)
goto find_bmap_bit;
@ -249,7 +249,7 @@ find_bit:
mark_buffer_dirty(bh);
sb->s_dirt = 1;
up(&sbi->s_bmlock);
mutex_unlock(&sbi->s_bmlock);
pr_debug("%d\n", blk);
return blk;
@ -259,7 +259,7 @@ err_bh_read:
sbi->s_bmap_bh = NULL;
sbi->s_last_bmap = ~0;
err_full:
up(&sbi->s_bmlock);
mutex_unlock(&sbi->s_bmlock);
pr_debug("failed\n");
return 0;
}

2
fs/affs/super.c
View file

@ -290,7 +290,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
if (!sbi)
return -ENOMEM;
sb->s_fs_info = sbi;
init_MUTEX(&sbi->s_bmlock);
mutex_init(&sbi->s_bmlock);
if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block,
&blocksize,&sbi->s_prefix,