Btrfs: Use bitmap_set/clear()

No functional change.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 3af64c6..0e23bba 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1134,15 +1134,13 @@ static void bitmap_clear_bits(struct btrfs_block_group_cache *block_group,
                              struct btrfs_free_space *info, u64 offset,
                              u64 bytes)
 {
-       unsigned long start, end;
-       unsigned long i;
+       unsigned long start, count;
 
        start = offset_to_bit(info->offset, block_group->sectorsize, offset);
-       end = start + bytes_to_bits(bytes, block_group->sectorsize);
-       BUG_ON(end > BITS_PER_BITMAP);
+       count = bytes_to_bits(bytes, block_group->sectorsize);
+       BUG_ON(start + count > BITS_PER_BITMAP);
 
-       for (i = start; i < end; i++)
-               clear_bit(i, info->bitmap);
+       bitmap_clear(info->bitmap, start, count);
 
        info->bytes -= bytes;
        block_group->free_space -= bytes;
@@ -1152,15 +1150,13 @@ static void bitmap_set_bits(struct btrfs_block_group_cache *block_group,
                            struct btrfs_free_space *info, u64 offset,
                            u64 bytes)
 {
-       unsigned long start, end;
-       unsigned long i;
+       unsigned long start, count;
 
        start = offset_to_bit(info->offset, block_group->sectorsize, offset);
-       end = start + bytes_to_bits(bytes, block_group->sectorsize);
-       BUG_ON(end > BITS_PER_BITMAP);
+       count = bytes_to_bits(bytes, block_group->sectorsize);
+       BUG_ON(start + count > BITS_PER_BITMAP);
 
-       for (i = start; i < end; i++)
-               set_bit(i, info->bitmap);
+       bitmap_set(info->bitmap, start, count);
 
        info->bytes += bytes;
        block_group->free_space += bytes;