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locking/ww_mutex: Add rt_mutex based lock type and accessors

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Provide the defines for RT mutex based ww_mutexes and fix up the debug logic
so it's either enabled by DEBUG_MUTEXES or DEBUG_RT_MUTEXES on RT kernels.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210815211304.908012566@linutronix.de
This commit is contained in:
Peter Zijlstra 2021-08-15 23:28:56 +02:00 • committed by Ingo Molnar
parent 8850d77370
commit 2408f7a378
2 changed files with 27 additions and 12 deletions
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6
kernel/locking/ww_mutex.h
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@ -180,7 +180,7 @@ static inline void lockdep_assert_wait_lock_held(struct rt_mutex *lock)
static __always_inline void
ww_mutex_lock_acquired(struct ww_mutex *ww, struct ww_acquire_ctx *ww_ctx)
{
#ifdef CONFIG_DEBUG_MUTEXES
#ifdef DEBUG_WW_MUTEXES
/*
* If this WARN_ON triggers, you used ww_mutex_lock to acquire,
* but released with a normal mutex_unlock in this call.
@ -413,7 +413,7 @@ static __always_inline int
__ww_mutex_kill(struct MUTEX *lock, struct ww_acquire_ctx *ww_ctx)
{
if (ww_ctx->acquired > 0) {
#ifdef CONFIG_DEBUG_MUTEXES
#ifdef DEBUG_WW_MUTEXES
struct ww_mutex *ww;
ww = container_of(lock, struct ww_mutex, base);
@ -559,7 +559,7 @@ __ww_mutex_add_waiter(struct MUTEX_WAITER *waiter,
static inline void __ww_mutex_unlock(struct ww_mutex *lock)
{
if (lock->ctx) {
#ifdef CONFIG_DEBUG_MUTEXES
#ifdef DEBUG_WW_MUTEXES
DEBUG_LOCKS_WARN_ON(!lock->ctx->acquired);
#endif
if (lock->ctx->acquired > 0)