diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_shrinker.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_shrinker.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c index a6fc1bdc48af..401006b4c6a3 100644 --- a/drivers/gpu/drm/i915/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c @@ -35,31 +35,22 @@ #include "i915_drv.h" #include "i915_trace.h" -static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task) +static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) { - if (!mutex_is_locked(mutex)) + switch (mutex_trylock_recursive(&dev->struct_mutex)) { + case MUTEX_TRYLOCK_FAILED: return false; -#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER) - return mutex->owner == task; -#else - /* Since UP may be pre-empted, we cannot assume that we own the lock */ - return false; -#endif -} - -static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) -{ - if (!mutex_trylock(&dev->struct_mutex)) { - if (!mutex_is_locked_by(&dev->struct_mutex, current)) - return false; + case MUTEX_TRYLOCK_SUCCESS: + *unlock = true; + return true; + case MUTEX_TRYLOCK_RECURSIVE: *unlock = false; - } else { - *unlock = true; + return true; } - return true; + BUG(); } static bool any_vma_pinned(struct drm_i915_gem_object *obj) |