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authorWu Fengguang <fengguang.wu@intel.com>2009-06-16 15:31:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:30 -0700
commitdc566127dd161b6c997466a2349ac179527ea89b (patch)
tree2973018dd4a89f0b20eaa0838eb654b6eff06f68 /include/linux/radix-tree.h
parentd30a11004e3411909f2448546f036a011978062e (diff)
downloadlwn-dc566127dd161b6c997466a2349ac179527ea89b.tar.gz
lwn-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/linux/radix-tree.h')
-rw-r--r--include/linux/radix-tree.h2
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,