From e13f13e039dc8f31168b5569120a7658035c80ee Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Mon, 2 May 2022 16:25:12 +0200 Subject: drm: Add DRM-managed mutex_init() Add drmm_mutex_init(), a helper that provides managed mutex cleanup. The mutex will be destroyed with the final reference of the DRM device. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220502142514.2174-2-tzimmermann@suse.de --- drivers/gpu/drm/drm_managed.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'drivers/gpu/drm/drm_managed.c') diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c index 37d7db6223be..4cf214de50c4 100644 --- a/drivers/gpu/drm/drm_managed.c +++ b/drivers/gpu/drm/drm_managed.c @@ -8,6 +8,7 @@ #include #include +#include #include #include @@ -262,3 +263,29 @@ void drmm_kfree(struct drm_device *dev, void *data) free_dr(dr_match); } EXPORT_SYMBOL(drmm_kfree); + +static void drmm_mutex_release(struct drm_device *dev, void *res) +{ + struct mutex *lock = res; + + mutex_destroy(lock); +} + +/** + * drmm_mutex_init - &drm_device-managed mutex_init() + * @dev: DRM device + * @lock: lock to be initialized + * + * Returns: + * 0 on success, or a negative errno code otherwise. + * + * This is a &drm_device-managed version of mutex_init(). The initialized + * lock is automatically destroyed on the final drm_dev_put(). + */ +int drmm_mutex_init(struct drm_device *dev, struct mutex *lock) +{ + mutex_init(lock); + + return drmm_add_action_or_reset(dev, drmm_mutex_release, lock); +} +EXPORT_SYMBOL(drmm_mutex_init); -- cgit v1.2.3