dummy/linux-stable-mirror
1
0
Fork 1
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2025-04-19 20:58:31 +09:00
Code Issues Packages Projects Releases Wiki Activity

lib/interval_tree: fix the comment of interval_tree_span_iter_next_gap()

Browse Source 
The comment of interval_tree_span_iter_next_gap() is not exact, nodes[1]
is not always !NULL.

There are threes cases here. If there is an interior hole, the statement
is correct. If there is a tailing hole or the contiguous used range span
to the end, nodes[1] is NULL.

Link: https://lkml.kernel.org/r/20250310074938.26756-8-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michel Lespinasse <michel@lespinasse.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Wei Yang 2025-03-10 07:49:38 +00:00 committed by Andrew Morton
parent 1981128578
commit ceb08ee965
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
lib/interval_tree.c
View File

@ -20,9 +20,15 @@ EXPORT_SYMBOL_GPL(interval_tree_iter_next);
/*
* Roll nodes[1] into nodes[0] by advancing nodes[1] to the end of a contiguous
* span of nodes. This makes nodes[0]->last the end of that contiguous used span
* indexes that started at the original nodes[1]->start. nodes[1] is now the
* first node starting the next used span. A hole span is between nodes[0]->last
* and nodes[1]->start. nodes[1] must be !NULL.
* of indexes that started at the original nodes[1]->start.
*
* If there is an interior hole, nodes[1] is now the first node starting the
* next used span. A hole span is between nodes[0]->last and nodes[1]->start.
*
* If there is a tailing hole, nodes[1] is now NULL. A hole span is between
* nodes[0]->last and last_index.
*
* If the contiguous used range span to last_index, nodes[1] is set to NULL.
*/
static void
interval_tree_span_iter_next_gap(struct interval_tree_span_iter *state)