The quilt patch titled
Subject: maple_tree: relax lockdep checks for on-stack trees
has been removed from the -mm tree. Its filename was
maple_tree-relax-lockdep-checks-for-on-stack-trees.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Subject: maple_tree: relax lockdep checks for on-stack trees
Date: Fri, 14 Jul 2023 15:55:49 -0400
To support early release of the maple tree locks, do not lockdep check the
lock if it is set to NULL. This is intended for the special case on-stack
use of tracking entries and not for general use.
Link: https://lkml.kernel.org/r/20230714195551.894800-3-Liam.Howlett@xxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oliver Sang <oliver.sang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/maple_tree.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/include/linux/maple_tree.h~maple_tree-relax-lockdep-checks-for-on-stack-trees
+++ a/include/linux/maple_tree.h
@@ -182,7 +182,9 @@ enum maple_type {
#ifdef CONFIG_LOCKDEP
typedef struct lockdep_map *lockdep_map_p;
-#define mt_lock_is_held(mt) lock_is_held(mt->ma_external_lock)
+#define mt_lock_is_held(mt) \
+ (!(mt)->ma_external_lock || lock_is_held((mt)->ma_external_lock))
+
#define mt_set_external_lock(mt, lock) \
(mt)->ma_external_lock = &(lock)->dep_map
#else
_
Patches currently in -mm which might be from Liam.Howlett@xxxxxxxxxx are
maple_tree-add-hex-output-to-maple_arange64-dump.patch
maple_tree-reorder-replacement-of-nodes-to-avoid-live-lock.patch
maple_tree-introduce-mas_put_in_tree.patch
maple_tree-introduce-mas_tree_parent-definition.patch
maple_tree-change-mas_adopt_children-parent-usage.patch
maple_tree-replace-data-before-marking-dead-in-split-and-spanning-store.patch
