The quilt patch titled
Subject: lib/interval_tree: fix the comment of interval_tree_span_iter_next_gap()
has been removed from the -mm tree. Its filename was
lib-interval_tree-fix-the-comment-of-interval_tree_span_iter_next_gap.patch
This patch was dropped because it was merged into the mm-nonmm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: lib/interval_tree: fix the comment of interval_tree_span_iter_next_gap()
Date: Mon, 10 Mar 2025 07:49:38 +0000
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@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Michel Lespinasse <michel@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/interval_tree.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/lib/interval_tree.c~lib-interval_tree-fix-the-comment-of-interval_tree_span_iter_next_gap
+++ a/lib/interval_tree.c
@@ -20,9 +20,15 @@ EXPORT_SYMBOL_GPL(interval_tree_iter_nex
/*
* 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)
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
