Commit 70b19876 authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Philipp Reisner
Browse files

drbd: Improve the drbd_find_overlap() documentation 



Describe how to reach any further overlapping intervals from the first
overlap found.

Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: default avatarLars Ellenberg <lars.ellenberg@linbit.com>
parent 43ae077d

drivers/block/drbd/drbd_interval.c

+5 −3
Original line number Diff line number Diff line
@@ -122,9 +122,11 @@ drbd_remove_interval(struct rb_root *root, struct drbd_interval *this) 
 * @sector:	start sector

 * @size:	size, aligned to 512 bytes

 *

 * Returns the interval overlapping with [sector, sector + size), or NULL.

 * When there is more than one overlapping interval in the tree, the interval

 * with the lowest start sector is returned.

 * Returns an interval overlapping with [sector, sector + size), or NULL if

 * there is none.  When there is more than one overlapping interval in the

 * tree, the interval with the lowest start sector is returned, and all other

 * overlapping intervals will be on the right side of the tree, reachable with

 * rb_next().

 */

struct drbd_interval *

drbd_find_overlap(struct rb_root *root, sector_t sector, unsigned int size)