Commit 134d153c authored by Liam R. Howlett's avatar Liam R. Howlett Committed by Andrew Morton
Browse files

maple_tree: relax lockdep checks for on-stack trees 

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@oracle.com


Signed-off-by: default avatarLiam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oliver Sang <oliver.sang@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 2574d5e4

include/linux/maple_tree.h

+3 −1
Original line number Diff line number Diff line
@@ -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