diff options
Diffstat (limited to 'drivers/gpu/drm/drm_modeset_lock.c')
| -rw-r--r-- | drivers/gpu/drm/drm_modeset_lock.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c index 61146f5b4f56..3551ae31f143 100644 --- a/drivers/gpu/drm/drm_modeset_lock.c +++ b/drivers/gpu/drm/drm_modeset_lock.c @@ -52,14 +52,16 @@ * drm_modeset_drop_locks(&ctx); * drm_modeset_acquire_fini(&ctx); * - * On top of of these per-object locks using &ww_mutex there's also an overall - * dev->mode_config.lock, for protecting everything else. Mostly this means - * probe state of connectors, and preventing hotplug add/removal of connectors. + * On top of of these per-object locks using &ww_mutex there's also an overall + * dev->mode_config.lock, for protecting everything else. Mostly this means + * probe state of connectors, and preventing hotplug add/removal of connectors. * - * Finally there's a bunch of dedicated locks to protect drm core internal - * lists and lookup data structures. + * Finally there's a bunch of dedicated locks to protect drm core internal + * lists and lookup data structures. */ +static DEFINE_WW_CLASS(crtc_ww_class); + /** * drm_modeset_lock_all - take all modeset locks * @dev: DRM device @@ -398,6 +400,17 @@ int drm_modeset_backoff_interruptible(struct drm_modeset_acquire_ctx *ctx) EXPORT_SYMBOL(drm_modeset_backoff_interruptible); /** + * drm_modeset_lock_init - initialize lock + * @lock: lock to init + */ +void drm_modeset_lock_init(struct drm_modeset_lock *lock) +{ + ww_mutex_init(&lock->mutex, &crtc_ww_class); + INIT_LIST_HEAD(&lock->head); +} +EXPORT_SYMBOL(drm_modeset_lock_init); + +/** * drm_modeset_lock - take modeset lock * @lock: lock to take * @ctx: acquire ctx |