hfsplus: convert the extents_lock in a mutex

Apple Extended HFS file system: The semaphore extents lock 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>

4 files changed, 12 insertions, 11 deletions

diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 12e899cd7886..fec8f61227ff 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -199,16 +199,16 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
                 goto done;
         }
 
-        down(&HFSPLUS_I(inode).extents_lock);
+        mutex_lock(&HFSPLUS_I(inode).extents_lock);
         res = hfsplus_ext_read_extent(inode, ablock);
         if (!res) {
                 dblock = hfsplus_ext_find_block(HFSPLUS_I(inode).cached_extents, ablock -
                                              HFSPLUS_I(inode).cached_start);
         } else {
-                up(&HFSPLUS_I(inode).extents_lock);
+                mutex_unlock(&HFSPLUS_I(inode).extents_lock);
                 return -EIO;
         }
-        up(&HFSPLUS_I(inode).extents_lock);
+        mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 
 done:
         dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock);
@@ -355,7 +355,7 @@ int hfsplus_file_extend(struct inode *inode)
                 return -ENOSPC;
         }
 
-        down(&HFSPLUS_I(inode).extents_lock);
+        mutex_lock(&HFSPLUS_I(inode).extents_lock);
         if (HFSPLUS_I(inode).alloc_blocks == HFSPLUS_I(inode).first_blocks)
                 goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).first_extents);
         else {
@@ -408,7 +408,7 @@ int hfsplus_file_extend(struct inode *inode)
                         goto insert_extent;
         }
 out:
-        up(&HFSPLUS_I(inode).extents_lock);
+        mutex_unlock(&HFSPLUS_I(inode).extents_lock);
         if (!res) {
                 HFSPLUS_I(inode).alloc_blocks += len;
                 mark_inode_dirty(inode);
@@ -465,7 +465,7 @@ void hfsplus_file_truncate(struct inode *inode)
         if (blk_cnt == alloc_cnt)
                 goto out;
 
-        down(&HFSPLUS_I(inode).extents_lock);
+        mutex_lock(&HFSPLUS_I(inode).extents_lock);
         hfs_find_init(HFSPLUS_SB(sb).ext_tree, &fd);
         while (1) {
                 if (alloc_cnt == HFSPLUS_I(inode).first_blocks) {
@@ -492,7 +492,7 @@ void hfsplus_file_truncate(struct inode *inode)
                 hfs_brec_remove(&fd);
         }
         hfs_find_exit(&fd);
-        up(&HFSPLUS_I(inode).extents_lock);
+        mutex_unlock(&HFSPLUS_I(inode).extents_lock);
 
         HFSPLUS_I(inode).alloc_blocks = blk_cnt;
 out:
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index 9e59537b43d5..f027a905225f 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -11,6 +11,7 @@
 #define _LINUX_HFSPLUS_FS_H
 
 #include <linux/fs.h>
+#include <linux/mutex.h>
 #include <linux/buffer_head.h>
 #include "hfsplus_raw.h"
 
@@ -154,7 +155,7 @@ struct hfsplus_sb_info {
 
 
 struct hfsplus_inode_info {
-        struct semaphore extents_lock;
+        struct mutex extents_lock;
         u32 clump_blocks, alloc_blocks;
         sector_t fs_blocks;
         /* Allocation extents from catalog record or volume header */
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 67e1c8b467c4..cc3b5e24339b 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -163,7 +163,7 @@ static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dent
 
         inode->i_ino = dir->i_ino;
         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-        init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+        mutex_init(&HFSPLUS_I(inode).extents_lock);
         HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
 
         hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
@@ -316,7 +316,7 @@ struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
         inode->i_nlink = 1;
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-        init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+        mutex_init(&HFSPLUS_I(inode).extents_lock);
         atomic_set(&HFSPLUS_I(inode).opencnt, 0);
         HFSPLUS_I(inode).flags = 0;
         memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index ce97a54518d8..3859118531c7 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -34,7 +34,7 @@ struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
                 return inode;
 
         INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
-        init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+        mutex_init(&HFSPLUS_I(inode).extents_lock);
         HFSPLUS_I(inode).flags = 0;
         HFSPLUS_I(inode).rsrc_inode = NULL;
         atomic_set(&HFSPLUS_I(inode).opencnt, 0);