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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-06-17 00:31:32 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-17 04:47:30 +0200 |
| commit | dc566127dd161b6c997466a2349ac179527ea89b (patch) | |
| tree | 2973018dd4a89f0b20eaa0838eb654b6eff06f68 /include | |
| parent | readahead: record mmap read-around states in file_ra_state (diff) | |
| download | linux-dc566127dd161b6c997466a2349ac179527ea89b.tar.xz linux-dc566127dd161b6c997466a2349ac179527ea89b.zip | |
radix-tree: add radix_tree_prev_hole()
The counterpart of radix_tree_next_hole(). To be used by context readahead.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Vladislav Bolkhovitin <vst@vlnb.net>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/radix-tree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h index 355f6e80db0d..c5da74918096 100644 --- a/include/linux/radix-tree.h +++ b/include/linux/radix-tree.h @@ -167,6 +167,8 @@ radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results, unsigned long first_index, unsigned int max_items); unsigned long radix_tree_next_hole(struct radix_tree_root *root, unsigned long index, unsigned long max_scan); +unsigned long radix_tree_prev_hole(struct radix_tree_root *root, + unsigned long index, unsigned long max_scan); int radix_tree_preload(gfp_t gfp_mask); void radix_tree_init(void); void *radix_tree_tag_set(struct radix_tree_root *root, |