By this patch, the lockdep_map structure takes no space if lockdep is disabled, making a debug facility's impact on unreleated kernel less.
Thanks to this, we don't need #ifdef to sparate code due to the lockdep_map structure. Signed-off-by: Byungchul Park <[email protected]> --- include/linux/lockdep.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index bfa8e0b..b6662d0 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -527,6 +527,11 @@ static inline void lockdep_on(void) */ struct lock_class_key { }; +/* + * The lockdep_map takes no space if lockdep is disabled: + */ +struct lockdep_map { }; + #define lockdep_depth(tsk) (0) #define lockdep_is_held_type(l, r) (1) -- 1.9.1
