diff --git a/fs/hfs/bitmap.c b/fs/hfs/bitmap.c
index 24e7579..c6e9736 100644
--- a/fs/hfs/bitmap.c
+++ b/fs/hfs/bitmap.c
@@ -145,7 +145,7 @@
 	if (!*num_bits)
 		return 0;
 
-	down(&HFS_SB(sb)->bitmap_lock);
+	mutex_lock(&HFS_SB(sb)->bitmap_lock);
 	bitmap = HFS_SB(sb)->bitmap;
 
 	pos = hfs_find_set_zero_bits(bitmap, HFS_SB(sb)->fs_ablocks, goal, num_bits);
@@ -162,7 +162,7 @@
 	HFS_SB(sb)->free_ablocks -= *num_bits;
 	hfs_bitmap_dirty(sb);
 out:
-	up(&HFS_SB(sb)->bitmap_lock);
+	mutex_unlock(&HFS_SB(sb)->bitmap_lock);
 	return pos;
 }
 
@@ -205,7 +205,7 @@
 	if ((start + count) > HFS_SB(sb)->fs_ablocks)
 		return -2;
 
-	down(&HFS_SB(sb)->bitmap_lock);
+	mutex_lock(&HFS_SB(sb)->bitmap_lock);
 	/* bitmap is always on a 32-bit boundary */
 	curr = HFS_SB(sb)->bitmap + (start / 32);
 	len = count;
@@ -236,7 +236,7 @@
 	}
 out:
 	HFS_SB(sb)->free_ablocks += len;
-	up(&HFS_SB(sb)->bitmap_lock);
+	mutex_unlock(&HFS_SB(sb)->bitmap_lock);
 	hfs_bitmap_dirty(sb);
 
 	return 0;