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| author | Andreas Gruenbacher <agruen@linbit.com> | 2011-02-04 14:11:05 +0300 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2011-09-28 12:26:36 +0400 |
| commit | 70b1987663851f4431a2f43d8ccefb7b6ac73331 (patch) | |
| tree | 7c175e2eb67b701da3ee5f8bb67dc77e003fbe9d /drivers/block/drbd/drbd_interval.c | |
| parent | 43ae077d0a1e98dd13112646fe967565febf4fe7 (diff) | |
| download | linux-70b1987663851f4431a2f43d8ccefb7b6ac73331.tar.xz | |
drbd: Improve the drbd_find_overlap() documentation
Describe how to reach any further overlapping intervals from the first
overlap found.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_interval.c')
| -rw-r--r-- | drivers/block/drbd/drbd_interval.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_interval.c b/drivers/block/drbd/drbd_interval.c index 0d17eaa89a69..14dbe2dd2d33 100644 --- a/drivers/block/drbd/drbd_interval.c +++ b/drivers/block/drbd/drbd_interval.c @@ -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) |