[PATCH] drm/scheduler: quieten kernel-doc warnings

[PATCH] drm/scheduler: quieten kernel-doc warnings

[Randy Dunlap]

Fix kernel-doc warnings in gpu_scheduler.h and sched_main.c.

Quashes these warnings:

include/drm/gpu_scheduler.h:316: warning: Function parameter or member 'work' not described in 'drm_sched_job'
include/drm/gpu_scheduler.h:332: warning: missing initial short description on line:
 * struct drm_sched_backend_ops
include/drm/gpu_scheduler.h:412: warning: missing initial short description on line:
 * struct drm_gpu_scheduler

include/drm/gpu_scheduler.h:461: warning: Function parameter or member 'dev' not described in 'drm_gpu_scheduler'
drivers/gpu/drm/scheduler/sched_main.c:201: warning: missing initial short description on line:
 * drm_sched_dependency_optimized
drivers/gpu/drm/scheduler/sched_main.c:995: warning: Function parameter or member 'dev' not described in 'drm_sched_init'

Fixes: 2d33948e4e00 ("drm/scheduler: add documentation")
Fixes: 8ab62eda177b ("drm/sched: Add device pointer to drm_gpu_scheduler")
Fixes: 542cff7893a3 ("drm/sched: Avoid lockdep spalt on killing a processes")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Jiawei Gu <Jiawei.Gu@amd.com>
Cc: dri-devel@lists.freedesktop.org
---
Feel free to make changes or suggest changes...

 drivers/gpu/drm/scheduler/sched_main.c |    3 ++-
 include/drm/gpu_scheduler.h            |   10 ++++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

--- linux-next-20220401.orig/drivers/gpu/drm/scheduler/sched_main.c
+++ linux-next-20220401/drivers/gpu/drm/scheduler/sched_main.c
@@ -198,7 +198,7 @@ static void drm_sched_job_done_cb(struct
 }
 
 /**
- * drm_sched_dependency_optimized
+ * drm_sched_dependency_optimized - test if the dependency can be optimized
  *
  * @fence: the dependency fence
  * @entity: the entity which depends on the above fence
@@ -984,6 +984,7 @@ static int drm_sched_main(void *param)
  *		used
  * @score: optional score atomic shared with other schedulers
  * @name: name used for debugging
+ * @dev: target &struct device
  *
  * Return 0 on success, otherwise error code.
  */
--- linux-next-20220401.orig/include/drm/gpu_scheduler.h
+++ linux-next-20220401/include/drm/gpu_scheduler.h
@@ -270,6 +270,7 @@ struct drm_sched_fence *to_drm_sched_fen
  * @sched: the scheduler instance on which this job is scheduled.
  * @s_fence: contains the fences for the scheduling of job.
  * @finish_cb: the callback for the finished fence.
+ * @work: scheduler work queue
  * @id: a unique id assigned to each job scheduled on the scheduler.
  * @karma: increment on every hang caused by this job. If this exceeds the hang
  *         limit of the scheduler then the job is marked guilty and will not
@@ -328,10 +329,10 @@ enum drm_gpu_sched_stat {
 };
 
 /**
- * struct drm_sched_backend_ops
+ * struct drm_sched_backend_ops - Define the backend operations
+ *	called by the scheduler
  *
- * Define the backend operations called by the scheduler,
- * these functions should be implemented in driver side.
+ * These functions should be implemented in the driver side.
  */
 struct drm_sched_backend_ops {
 	/**
@@ -408,7 +409,7 @@ struct drm_sched_backend_ops {
 };
 
 /**
- * struct drm_gpu_scheduler
+ * struct drm_gpu_scheduler - scheduler instance-specific data
  *
  * @ops: backend operations provided by the driver.
  * @hw_submission_limit: the max size of the hardware queue.
@@ -434,6 +435,7 @@ struct drm_sched_backend_ops {
  * @_score: score used when the driver doesn't provide one
  * @ready: marks if the underlying HW is ready to work
  * @free_guilty: A hit to time out handler to free the guilty job.
+ * @dev: system &struct device
  *
  * One scheduler is implemented for each hardware ring.
  */

Re: [PATCH] drm/scheduler: quieten kernel-doc warnings

[Christian König]

Am 04.04.22 um 06:25 schrieb Randy Dunlap:
> Fix kernel-doc warnings in gpu_scheduler.h and sched_main.c.
>
> Quashes these warnings:
>
> include/drm/gpu_scheduler.h:316: warning: Function parameter or member 'work' not described in 'drm_sched_job'
> include/drm/gpu_scheduler.h:332: warning: missing initial short description on line:
>   * struct drm_sched_backend_ops
> include/drm/gpu_scheduler.h:412: warning: missing initial short description on line:
>   * struct drm_gpu_scheduler
>
> include/drm/gpu_scheduler.h:461: warning: Function parameter or member 'dev' not described in 'drm_gpu_scheduler'
> drivers/gpu/drm/scheduler/sched_main.c:201: warning: missing initial short description on line:
>   * drm_sched_dependency_optimized
> drivers/gpu/drm/scheduler/sched_main.c:995: warning: Function parameter or member 'dev' not described in 'drm_sched_init'
>
> Fixes: 2d33948e4e00 ("drm/scheduler: add documentation")
> Fixes: 8ab62eda177b ("drm/sched: Add device pointer to drm_gpu_scheduler")
> Fixes: 542cff7893a3 ("drm/sched: Avoid lockdep spalt on killing a processes")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
> Cc: Nayan Deshmukh <nayan26deshmukh@gmail.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: Christian König <christian.koenig@amd.com>
> Cc: Jiawei Gu <Jiawei.Gu@amd.com>
> Cc: dri-devel@lists.freedesktop.org

Acked-by: Christian König <christian.koenig@amd.com>, but Andrey should 
take a look as well.

> ---
> Feel free to make changes or suggest changes...
>
>   drivers/gpu/drm/scheduler/sched_main.c |    3 ++-
>   include/drm/gpu_scheduler.h            |   10 ++++++----
>   2 files changed, 8 insertions(+), 5 deletions(-)
>
> --- linux-next-20220401.orig/drivers/gpu/drm/scheduler/sched_main.c
> +++ linux-next-20220401/drivers/gpu/drm/scheduler/sched_main.c
> @@ -198,7 +198,7 @@ static void drm_sched_job_done_cb(struct
>   }
>   
>   /**
> - * drm_sched_dependency_optimized
> + * drm_sched_dependency_optimized - test if the dependency can be optimized
>    *
>    * @fence: the dependency fence
>    * @entity: the entity which depends on the above fence
> @@ -984,6 +984,7 @@ static int drm_sched_main(void *param)
>    *		used
>    * @score: optional score atomic shared with other schedulers
>    * @name: name used for debugging
> + * @dev: target &struct device
>    *
>    * Return 0 on success, otherwise error code.
>    */
> --- linux-next-20220401.orig/include/drm/gpu_scheduler.h
> +++ linux-next-20220401/include/drm/gpu_scheduler.h
> @@ -270,6 +270,7 @@ struct drm_sched_fence *to_drm_sched_fen
>    * @sched: the scheduler instance on which this job is scheduled.
>    * @s_fence: contains the fences for the scheduling of job.
>    * @finish_cb: the callback for the finished fence.
> + * @work: scheduler work queue
>    * @id: a unique id assigned to each job scheduled on the scheduler.
>    * @karma: increment on every hang caused by this job. If this exceeds the hang
>    *         limit of the scheduler then the job is marked guilty and will not
> @@ -328,10 +329,10 @@ enum drm_gpu_sched_stat {
>   };
>   
>   /**
> - * struct drm_sched_backend_ops
> + * struct drm_sched_backend_ops - Define the backend operations
> + *	called by the scheduler
>    *
> - * Define the backend operations called by the scheduler,
> - * these functions should be implemented in driver side.
> + * These functions should be implemented in the driver side.
>    */
>   struct drm_sched_backend_ops {
>   	/**
> @@ -408,7 +409,7 @@ struct drm_sched_backend_ops {
>   };
>   
>   /**
> - * struct drm_gpu_scheduler
> + * struct drm_gpu_scheduler - scheduler instance-specific data
>    *
>    * @ops: backend operations provided by the driver.
>    * @hw_submission_limit: the max size of the hardware queue.
> @@ -434,6 +435,7 @@ struct drm_sched_backend_ops {
>    * @_score: score used when the driver doesn't provide one
>    * @ready: marks if the underlying HW is ready to work
>    * @free_guilty: A hit to time out handler to free the guilty job.
> + * @dev: system &struct device
>    *
>    * One scheduler is implemented for each hardware ring.
>    */

Re: [PATCH] drm/scheduler: quieten kernel-doc warnings

[Andrey Grodzovsky]

On 2022-04-04 00:25, Randy Dunlap wrote:
> Fix kernel-doc warnings in gpu_scheduler.h and sched_main.c.
> 
> Quashes these warnings:
> 
> include/drm/gpu_scheduler.h:316: warning: Function parameter or member 'work' not described in 'drm_sched_job'

Looks good to me except one point is that I already commited a fix for 
the above warning to drm-misc-next.

Andrey

> include/drm/gpu_scheduler.h:332: warning: missing initial short description on line:
>   * struct drm_sched_backend_ops
> include/drm/gpu_scheduler.h:412: warning: missing initial short description on line:
>   * struct drm_gpu_scheduler
> 
> include/drm/gpu_scheduler.h:461: warning: Function parameter or member 'dev' not described in 'drm_gpu_scheduler'
> drivers/gpu/drm/scheduler/sched_main.c:201: warning: missing initial short description on line:
>   * drm_sched_dependency_optimized
> drivers/gpu/drm/scheduler/sched_main.c:995: warning: Function parameter or member 'dev' not described in 'drm_sched_init'
> 
> Fixes: 2d33948e4e00 ("drm/scheduler: add documentation")
> Fixes: 8ab62eda177b ("drm/sched: Add device pointer to drm_gpu_scheduler")
> Fixes: 542cff7893a3 ("drm/sched: Avoid lockdep spalt on killing a processes")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
> Cc: Nayan Deshmukh <nayan26deshmukh@gmail.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: Christian König <christian.koenig@amd.com>
> Cc: Jiawei Gu <Jiawei.Gu@amd.com>
> Cc: dri-devel@lists.freedesktop.org
> ---
> Feel free to make changes or suggest changes...
> 
>   drivers/gpu/drm/scheduler/sched_main.c |    3 ++-
>   include/drm/gpu_scheduler.h            |   10 ++++++----
>   2 files changed, 8 insertions(+), 5 deletions(-)
> 
> --- linux-next-20220401.orig/drivers/gpu/drm/scheduler/sched_main.c
> +++ linux-next-20220401/drivers/gpu/drm/scheduler/sched_main.c
> @@ -198,7 +198,7 @@ static void drm_sched_job_done_cb(struct
>   }
>   
>   /**
> - * drm_sched_dependency_optimized
> + * drm_sched_dependency_optimized - test if the dependency can be optimized
>    *
>    * @fence: the dependency fence
>    * @entity: the entity which depends on the above fence
> @@ -984,6 +984,7 @@ static int drm_sched_main(void *param)
>    *		used
>    * @score: optional score atomic shared with other schedulers
>    * @name: name used for debugging
> + * @dev: target &struct device
>    *
>    * Return 0 on success, otherwise error code.
>    */
> --- linux-next-20220401.orig/include/drm/gpu_scheduler.h
> +++ linux-next-20220401/include/drm/gpu_scheduler.h
> @@ -270,6 +270,7 @@ struct drm_sched_fence *to_drm_sched_fen
>    * @sched: the scheduler instance on which this job is scheduled.
>    * @s_fence: contains the fences for the scheduling of job.
>    * @finish_cb: the callback for the finished fence.
> + * @work: scheduler work queue
>    * @id: a unique id assigned to each job scheduled on the scheduler.
>    * @karma: increment on every hang caused by this job. If this exceeds the hang
>    *         limit of the scheduler then the job is marked guilty and will not
> @@ -328,10 +329,10 @@ enum drm_gpu_sched_stat {
>   };
>   
>   /**
> - * struct drm_sched_backend_ops
> + * struct drm_sched_backend_ops - Define the backend operations
> + *	called by the scheduler
>    *
> - * Define the backend operations called by the scheduler,
> - * these functions should be implemented in driver side.
> + * These functions should be implemented in the driver side.
>    */
>   struct drm_sched_backend_ops {
>   	/**
> @@ -408,7 +409,7 @@ struct drm_sched_backend_ops {
>   };
>   
>   /**
> - * struct drm_gpu_scheduler
> + * struct drm_gpu_scheduler - scheduler instance-specific data
>    *
>    * @ops: backend operations provided by the driver.
>    * @hw_submission_limit: the max size of the hardware queue.
> @@ -434,6 +435,7 @@ struct drm_sched_backend_ops {
>    * @_score: score used when the driver doesn't provide one
>    * @ready: marks if the underlying HW is ready to work
>    * @free_guilty: A hit to time out handler to free the guilty job.
> + * @dev: system &struct device
>    *
>    * One scheduler is implemented for each hardware ring.
>    */

Re: [PATCH] drm/scheduler: quieten kernel-doc warnings

[Randy Dunlap]

On 4/4/22 07:34, Andrey Grodzovsky wrote:
> On 2022-04-04 00:25, Randy Dunlap wrote:
>> Fix kernel-doc warnings in gpu_scheduler.h and sched_main.c.
>>
>> Quashes these warnings:
>>
>> include/drm/gpu_scheduler.h:316: warning: Function parameter or member 'work' not described in 'drm_sched_job'
> 
> Looks good to me except one point is that I already commited a fix for the above warning to drm-misc-next.
> 

OK. Do I need to send a v2 without the header file fix?

thanks.

> 
>> include/drm/gpu_scheduler.h:332: warning: missing initial short description on line:
>>   * struct drm_sched_backend_ops
>> include/drm/gpu_scheduler.h:412: warning: missing initial short description on line:
>>   * struct drm_gpu_scheduler
>>
>> include/drm/gpu_scheduler.h:461: warning: Function parameter or member 'dev' not described in 'drm_gpu_scheduler'
>> drivers/gpu/drm/scheduler/sched_main.c:201: warning: missing initial short description on line:
>>   * drm_sched_dependency_optimized
>> drivers/gpu/drm/scheduler/sched_main.c:995: warning: Function parameter or member 'dev' not described in 'drm_sched_init'
>>
>> Fixes: 2d33948e4e00 ("drm/scheduler: add documentation")
>> Fixes: 8ab62eda177b ("drm/sched: Add device pointer to drm_gpu_scheduler")
>> Fixes: 542cff7893a3 ("drm/sched: Avoid lockdep spalt on killing a processes")
>> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
>> Cc: David Airlie <airlied@linux.ie>
>> Cc: Daniel Vetter <daniel@ffwll.ch>
>> Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
>> Cc: Nayan Deshmukh <nayan26deshmukh@gmail.com>
>> Cc: Alex Deucher <alexander.deucher@amd.com>
>> Cc: Christian König <christian.koenig@amd.com>
>> Cc: Jiawei Gu <Jiawei.Gu@amd.com>
>> Cc: dri-devel@lists.freedesktop.org
>> ---
>> Feel free to make changes or suggest changes...
>>
>>   drivers/gpu/drm/scheduler/sched_main.c |    3 ++-
>>   include/drm/gpu_scheduler.h            |   10 ++++++----
>>   2 files changed, 8 insertions(+), 5 deletions(-)
>>
>> --- linux-next-20220401.orig/drivers/gpu/drm/scheduler/sched_main.c
>> +++ linux-next-20220401/drivers/gpu/drm/scheduler/sched_main.c
>> @@ -198,7 +198,7 @@ static void drm_sched_job_done_cb(struct
>>   }
>>     /**
>> - * drm_sched_dependency_optimized
>> + * drm_sched_dependency_optimized - test if the dependency can be optimized
>>    *
>>    * @fence: the dependency fence
>>    * @entity: the entity which depends on the above fence
>> @@ -984,6 +984,7 @@ static int drm_sched_main(void *param)
>>    *        used
>>    * @score: optional score atomic shared with other schedulers
>>    * @name: name used for debugging
>> + * @dev: target &struct device
>>    *
>>    * Return 0 on success, otherwise error code.
>>    */
>> --- linux-next-20220401.orig/include/drm/gpu_scheduler.h
>> +++ linux-next-20220401/include/drm/gpu_scheduler.h
>> @@ -270,6 +270,7 @@ struct drm_sched_fence *to_drm_sched_fen
>>    * @sched: the scheduler instance on which this job is scheduled.
>>    * @s_fence: contains the fences for the scheduling of job.
>>    * @finish_cb: the callback for the finished fence.
>> + * @work: scheduler work queue
>>    * @id: a unique id assigned to each job scheduled on the scheduler.
>>    * @karma: increment on every hang caused by this job. If this exceeds the hang
>>    *         limit of the scheduler then the job is marked guilty and will not
>> @@ -328,10 +329,10 @@ enum drm_gpu_sched_stat {
>>   };
>>     /**
>> - * struct drm_sched_backend_ops
>> + * struct drm_sched_backend_ops - Define the backend operations
>> + *    called by the scheduler
>>    *
>> - * Define the backend operations called by the scheduler,
>> - * these functions should be implemented in driver side.
>> + * These functions should be implemented in the driver side.
>>    */
>>   struct drm_sched_backend_ops {
>>       /**
>> @@ -408,7 +409,7 @@ struct drm_sched_backend_ops {
>>   };
>>     /**
>> - * struct drm_gpu_scheduler
>> + * struct drm_gpu_scheduler - scheduler instance-specific data
>>    *
>>    * @ops: backend operations provided by the driver.
>>    * @hw_submission_limit: the max size of the hardware queue.
>> @@ -434,6 +435,7 @@ struct drm_sched_backend_ops {
>>    * @_score: score used when the driver doesn't provide one
>>    * @ready: marks if the underlying HW is ready to work
>>    * @free_guilty: A hit to time out handler to free the guilty job.
>> + * @dev: system &struct device
>>    *
>>    * One scheduler is implemented for each hardware ring.
>>    */

-- 
~Randy

Re: [PATCH] drm/scheduler: quieten kernel-doc warnings

[Andrey Grodzovsky]

Seems to me better this way to avoid merge conflicts ?

Andrey

On 2022-04-04 11:33, Randy Dunlap wrote:
> 
> 
> On 4/4/22 07:34, Andrey Grodzovsky wrote:
>> On 2022-04-04 00:25, Randy Dunlap wrote:
>>> Fix kernel-doc warnings in gpu_scheduler.h and sched_main.c.
>>>
>>> Quashes these warnings:
>>>
>>> include/drm/gpu_scheduler.h:316: warning: Function parameter or member 'work' not described in 'drm_sched_job'
>>
>> Looks good to me except one point is that I already commited a fix for the above warning to drm-misc-next.
>>
> 
> OK. Do I need to send a v2 without the header file fix?
> 
> thanks.
> 
>>
>>> include/drm/gpu_scheduler.h:332: warning: missing initial short description on line:
>>>    * struct drm_sched_backend_ops
>>> include/drm/gpu_scheduler.h:412: warning: missing initial short description on line:
>>>    * struct drm_gpu_scheduler
>>>
>>> include/drm/gpu_scheduler.h:461: warning: Function parameter or member 'dev' not described in 'drm_gpu_scheduler'
>>> drivers/gpu/drm/scheduler/sched_main.c:201: warning: missing initial short description on line:
>>>    * drm_sched_dependency_optimized
>>> drivers/gpu/drm/scheduler/sched_main.c:995: warning: Function parameter or member 'dev' not described in 'drm_sched_init'
>>>
>>> Fixes: 2d33948e4e00 ("drm/scheduler: add documentation")
>>> Fixes: 8ab62eda177b ("drm/sched: Add device pointer to drm_gpu_scheduler")
>>> Fixes: 542cff7893a3 ("drm/sched: Avoid lockdep spalt on killing a processes")
>>> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
>>> Cc: David Airlie <airlied@linux.ie>
>>> Cc: Daniel Vetter <daniel@ffwll.ch>
>>> Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
>>> Cc: Nayan Deshmukh <nayan26deshmukh@gmail.com>
>>> Cc: Alex Deucher <alexander.deucher@amd.com>
>>> Cc: Christian König <christian.koenig@amd.com>
>>> Cc: Jiawei Gu <Jiawei.Gu@amd.com>
>>> Cc: dri-devel@lists.freedesktop.org
>>> ---
>>> Feel free to make changes or suggest changes...
>>>
>>>    drivers/gpu/drm/scheduler/sched_main.c |    3 ++-
>>>    include/drm/gpu_scheduler.h            |   10 ++++++----
>>>    2 files changed, 8 insertions(+), 5 deletions(-)
>>>
>>> --- linux-next-20220401.orig/drivers/gpu/drm/scheduler/sched_main.c
>>> +++ linux-next-20220401/drivers/gpu/drm/scheduler/sched_main.c
>>> @@ -198,7 +198,7 @@ static void drm_sched_job_done_cb(struct
>>>    }
>>>      /**
>>> - * drm_sched_dependency_optimized
>>> + * drm_sched_dependency_optimized - test if the dependency can be optimized
>>>     *
>>>     * @fence: the dependency fence
>>>     * @entity: the entity which depends on the above fence
>>> @@ -984,6 +984,7 @@ static int drm_sched_main(void *param)
>>>     *        used
>>>     * @score: optional score atomic shared with other schedulers
>>>     * @name: name used for debugging
>>> + * @dev: target &struct device
>>>     *
>>>     * Return 0 on success, otherwise error code.
>>>     */
>>> --- linux-next-20220401.orig/include/drm/gpu_scheduler.h
>>> +++ linux-next-20220401/include/drm/gpu_scheduler.h
>>> @@ -270,6 +270,7 @@ struct drm_sched_fence *to_drm_sched_fen
>>>     * @sched: the scheduler instance on which this job is scheduled.
>>>     * @s_fence: contains the fences for the scheduling of job.
>>>     * @finish_cb: the callback for the finished fence.
>>> + * @work: scheduler work queue
>>>     * @id: a unique id assigned to each job scheduled on the scheduler.
>>>     * @karma: increment on every hang caused by this job. If this exceeds the hang
>>>     *         limit of the scheduler then the job is marked guilty and will not
>>> @@ -328,10 +329,10 @@ enum drm_gpu_sched_stat {
>>>    };
>>>      /**
>>> - * struct drm_sched_backend_ops
>>> + * struct drm_sched_backend_ops - Define the backend operations
>>> + *    called by the scheduler
>>>     *
>>> - * Define the backend operations called by the scheduler,
>>> - * these functions should be implemented in driver side.
>>> + * These functions should be implemented in the driver side.
>>>     */
>>>    struct drm_sched_backend_ops {
>>>        /**
>>> @@ -408,7 +409,7 @@ struct drm_sched_backend_ops {
>>>    };
>>>      /**
>>> - * struct drm_gpu_scheduler
>>> + * struct drm_gpu_scheduler - scheduler instance-specific data
>>>     *
>>>     * @ops: backend operations provided by the driver.
>>>     * @hw_submission_limit: the max size of the hardware queue.
>>> @@ -434,6 +435,7 @@ struct drm_sched_backend_ops {
>>>     * @_score: score used when the driver doesn't provide one
>>>     * @ready: marks if the underlying HW is ready to work
>>>     * @free_guilty: A hit to time out handler to free the guilty job.
>>> + * @dev: system &struct device
>>>     *
>>>     * One scheduler is implemented for each hardware ring.
>>>     */
>