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| author | Josef Bacik <josef@redhat.com> | 2011-09-26 19:56:12 +0200 |
|---|---|---|
| committer | Josef Bacik <josef@redhat.com> | 2011-10-19 21:12:47 +0200 |
| commit | 462d6fac8960a3ba797927adfcbd29d503eb16fd (patch) | |
| tree | 82e72468a746b55d09246db8272823c2907633e1 /fs/btrfs/extent_io.h | |
| parent | Btrfs: check unused against how much space we actually want (diff) | |
| download | linux-462d6fac8960a3ba797927adfcbd29d503eb16fd.tar.xz linux-462d6fac8960a3ba797927adfcbd29d503eb16fd.zip | |
Btrfs: introduce convert_extent_bit
If I have a range where I know a certain bit is and I want to set it to another
bit the only option I have is to call set and then clear bit, which will result
in 2 tree searches. This is inefficient, so introduce convert_extent_bit which
will go through and set the bit I want and clear the old bit I don't want.
Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/extent_io.h')
| -rw-r--r-- | fs/btrfs/extent_io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 7b2f0c3e7929..cea445dcd806 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -214,6 +214,8 @@ int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); +int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, + int bits, int clear_bits, gfp_t mask); int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask); int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |