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locking/ww_mutex: Abstract out internal lock accesses

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Accessing the internal wait_lock of mutex and rtmutex is slightly
different. Provide helper functions for that.

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/20210815211304.734635961@linutronix.de
This commit is contained in:
Thomas Gleixner
2021-08-15 23:28:52 +02:00
committed by Ingo Molnar
parent bdb189148d
commit 653a5b0bd9
2 changed files with 28 additions and 8 deletions
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13
include/linux/ww_mutex.h
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@@ -19,6 +19,11 @@
#include <linux/mutex.h>
#define WW_MUTEX_BASE mutex
#define ww_mutex_base_init(l,n,k) __mutex_init(l,n,k)
#define ww_mutex_base_trylock(l) mutex_trylock(l)
#define ww_mutex_base_is_locked(b) mutex_is_locked((b))
struct ww_class {
atomic_long_t stamp;
struct lock_class_key acquire_key;
@@ -29,7 +34,7 @@ struct ww_class {
};
struct ww_mutex {
struct mutex base;
struct WW_MUTEX_BASE base;
struct ww_acquire_ctx *ctx;
#ifdef CONFIG_DEBUG_MUTEXES
struct ww_class *ww_class;
@@ -82,7 +87,7 @@ struct ww_acquire_ctx {
static inline void ww_mutex_init(struct ww_mutex *lock,
struct ww_class *ww_class)
{
__mutex_init(&lock->base, ww_class->mutex_name, &ww_class->mutex_key);
ww_mutex_base_init(&lock->base, ww_class->mutex_name, &ww_class->mutex_key);
lock->ctx = NULL;
#ifdef CONFIG_DEBUG_MUTEXES
lock->ww_class = ww_class;
@@ -330,7 +335,7 @@ extern void ww_mutex_unlock(struct ww_mutex *lock);
*/
static inline int __must_check ww_mutex_trylock(struct ww_mutex *lock)
{
return mutex_trylock(&lock->base);
return ww_mutex_base_trylock(&lock->base);
}
/***
@@ -354,7 +359,7 @@ static inline void ww_mutex_destroy(struct ww_mutex *lock)
*/
static inline bool ww_mutex_is_locked(struct ww_mutex *lock)
{
return mutex_is_locked(&lock->base);
return ww_mutex_base_is_locked(&lock->base);
}
#endif