diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-05-02 16:25:12 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-05-05 09:04:10 +0200 |
| commit | e13f13e039dc8f31168b5569120a7658035c80ee (patch) | |
| tree | c7d809d901f8b170f5cc329bb44204f9907dd34e | |
| parent | cce6bedb38ed08f1c3a9b1b01fbba0fdb472fb50 (diff) | |
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 <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220502142514.2174-2-tzimmermann@suse.de
| -rw-r--r-- | drivers/gpu/drm/drm_managed.c | 27 | ||||
| -rw-r--r-- | include/drm/drm_managed.h | 3 |
2 files changed, 30 insertions, 0 deletions
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 <drm/drm_managed.h> #include <linux/list.h> +#include <linux/mutex.h> #include <linux/slab.h> #include <linux/spinlock.h> @@ -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); diff --git a/include/drm/drm_managed.h b/include/drm/drm_managed.h index b45c6fbf53ac..359883942612 100644 --- a/include/drm/drm_managed.h +++ b/include/drm/drm_managed.h @@ -8,6 +8,7 @@ #include <linux/types.h> struct drm_device; +struct mutex; typedef void (*drmres_release_t)(struct drm_device *dev, void *res); @@ -104,4 +105,6 @@ char *drmm_kstrdup(struct drm_device *dev, const char *s, gfp_t gfp); void drmm_kfree(struct drm_device *dev, void *data); +int drmm_mutex_init(struct drm_device *dev, struct mutex *lock); + #endif |