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locking/lockdep: Provide lockdep_assert{,_once}() helpers 

Extract lockdep_assert{,_once}() helpers to more easily write composite
assertions like, for example:

	lockdep_assert(lockdep_is_held(&drm_device.master_mutex) ||
		       lockdep_is_held(&drm_file.master_lookup_lock));

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802105957.77692-2-desmondcheongzx@gmail.com
This commit is contained in:
Peter Zijlstra 2021-08-02 18:59:56 +08:00 committed by Daniel Vetter
parent 5a04227326
commit d19c813788
1 changed files with 21 additions and 20 deletions
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41
include/linux/lockdep.h
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@ -306,31 +306,29 @@ extern void lock_unpin_lock(struct lockdep_map *lock, struct pin_cookie);
#define lockdep_depth(tsk) (debug_locks ? (tsk)->lockdep_depth : 0)
#define lockdep_assert_held(l) do { \
WARN_ON(debug_locks && \
lockdep_is_held(l) == LOCK_STATE_NOT_HELD); \
} while (0)
#define lockdep_assert(cond) \
do { WARN_ON(debug_locks && !(cond)); } while (0)
#define lockdep_assert_not_held(l) do { \
WARN_ON(debug_locks && \
lockdep_is_held(l) == LOCK_STATE_HELD); \
} while (0)
#define lockdep_assert_once(cond) \
do { WARN_ON_ONCE(debug_locks && !(cond)); } while (0)
#define lockdep_assert_held_write(l) do { \
WARN_ON(debug_locks && !lockdep_is_held_type(l, 0)); \
} while (0)
#define lockdep_assert_held(l) \
lockdep_assert(lockdep_is_held(l) != LOCK_STATE_NOT_HELD)
#define lockdep_assert_held_read(l) do { \
WARN_ON(debug_locks && !lockdep_is_held_type(l, 1)); \
} while (0)
#define lockdep_assert_not_held(l) \
lockdep_assert(lockdep_is_held(l) != LOCK_STATE_HELD)
#define lockdep_assert_held_once(l) do { \
WARN_ON_ONCE(debug_locks && !lockdep_is_held(l)); \
} while (0)
#define lockdep_assert_held_write(l) \
lockdep_assert(lockdep_is_held_type(l, 0))
#define lockdep_assert_none_held_once() do { \
WARN_ON_ONCE(debug_locks && current->lockdep_depth); \
} while (0)
#define lockdep_assert_held_read(l) \
lockdep_assert(lockdep_is_held_type(l, 1))
#define lockdep_assert_held_once(l) \
lockdep_assert_once(lockdep_is_held(l) != LOCK_STATE_NOT_HELD)
#define lockdep_assert_none_held_once() \
lockdep_assert_once(!current->lockdep_depth)
#define lockdep_recursing(tsk) ((tsk)->lockdep_recursion)
@ -407,6 +405,9 @@ extern int lock_is_held(const void *);
extern int lockdep_is_held(const void *);
#define lockdep_is_held_type(l, r) (1)
#define lockdep_assert(c) do { } while (0)
#define lockdep_assert_once(c) do { } while (0)
#define lockdep_assert_held(l) do { (void)(l); } while (0)
#define lockdep_assert_not_held(l) do { (void)(l); } while (0)
#define lockdep_assert_held_write(l) do { (void)(l); } while (0)