dev/drm2/drm_lock.c

43 static int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context);
64 	if (lock->context == DRM_KERNEL_CONTEXT) {
65 		DRM_ERROR("Process %d using kernel context %d\n",
66 			  DRM_CURRENTPID, lock->context);
71 		  lock->context, DRM_CURRENTPID,
87 		if (drm_lock_take(&master->lock, lock->context)) {
107 	DRM_DEBUG("%d %s\n", lock->context,
121 		dev->sigdata.context = lock->context;
131 				  lock->context);
155 	if (lock->context == DRM_KERNEL_CONTEXT) {
156 		DRM_ERROR("Process %d using kernel context %d\n",
157 			  DRM_CURRENTPID, lock->context);
163 	if (drm_lock_free(&master->lock, lock->context)) {
177  * \param context locking context.
180  * Attempt to mark the lock as held by the given context, via the \p cmpxchg instruction.
184 		  unsigned int context)
195 			new = context | _DRM_LOCK_HELD |
203 	if (_DRM_LOCKING_CONTEXT(old) == context) {
205 			if (context != DRM_KERNEL_CONTEXT) {
207 					  context);
213 	if ((_DRM_LOCKING_CONTEXT(new)) == context && (new & _DRM_LOCK_HELD)) {
221  * This takes a lock forcibly and hands it to context.	Should ONLY be used
226  * \param context locking context.
230  * Marks the lock as held by the given context, via the \p cmpxchg instruction.
233 			     unsigned int context)
241 		new = context | _DRM_LOCK_HELD;
252  * \param context context.
258 int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context)
278 	if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
280 			  context, _DRM_LOCKING_CONTEXT(old));
305 	    || _DRM_LOCKING_CONTEXT(s->lock->lock) != s->context)
320  * with the kernel context if it is free, otherwise it gets the highest priority when and if