affs: convert s_bmlock into a mutex

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>

3 files changed, 12 insertions, 11 deletions

diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index 223b1917093..e9ec915f755 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -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 */
diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index c4a5ad09ddf..dc5ef14bdc1 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -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;
 }
diff --git a/fs/affs/super.c b/fs/affs/super.c
index d214837d5e4..4e030956640 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -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,