Messages in this thread Patch in this message | | | From | "Liam R. Howlett" <> | Subject | [PATCH v2 2/4] maple_tree: Relax lockdep checks for on-stack trees | Date | Fri, 14 Jul 2023 15:55:49 -0400 |
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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.
Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> --- include/linux/maple_tree.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 7769270b85e8..6618c1512886 100644 --- a/include/linux/maple_tree.h +++ b/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 -- 2.39.2
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