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Btrfs: Use bitmap_set/clear()

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No functional change.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
This commit is contained in:
Li Zefan 2011-03-14 13:40:51 +08:00
parent 92c4231181
commit f38b6e754d
1 changed files with 8 additions and 12 deletions
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20
fs/btrfs/free-space-cache.c
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@ -1134,15 +1134,13 @@ static void bitmap_clear_bits(struct btrfs_block_group_cache *block_group,
struct btrfs_free_space *info, u64 offset, struct btrfs_free_space *info, u64 offset,
u64 bytes) u64 bytes)
{ {
unsigned long start, end; unsigned long start, count;
unsigned long i;
start = offset_to_bit(info->offset, block_group->sectorsize, offset); start = offset_to_bit(info->offset, block_group->sectorsize, offset);
end = start + bytes_to_bits(bytes, block_group->sectorsize); count = bytes_to_bits(bytes, block_group->sectorsize);
BUG_ON(end > BITS_PER_BITMAP); BUG_ON(start + count > BITS_PER_BITMAP);
for (i = start; i < end; i++) bitmap_clear(info->bitmap, start, count);
clear_bit(i, info->bitmap);
info->bytes -= bytes; info->bytes -= bytes;
block_group->free_space -= 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, struct btrfs_free_space *info, u64 offset,
u64 bytes) u64 bytes)
{ {
unsigned long start, end; unsigned long start, count;
unsigned long i;
start = offset_to_bit(info->offset, block_group->sectorsize, offset); start = offset_to_bit(info->offset, block_group->sectorsize, offset);
end = start + bytes_to_bits(bytes, block_group->sectorsize); count = bytes_to_bits(bytes, block_group->sectorsize);
BUG_ON(end > BITS_PER_BITMAP); BUG_ON(start + count > BITS_PER_BITMAP);
for (i = start; i < end; i++) bitmap_set(info->bitmap, start, count);
set_bit(i, info->bitmap);
info->bytes += bytes; info->bytes += bytes;
block_group->free_space += bytes; block_group->free_space += bytes;