[PATCH v4 06/10] accel/rocket: Add IOCTL for BO creation

[Markus Elfring]

…
> +++ b/drivers/accel/rocket/rocket_gem.c
> @@ -0,0 +1,131 @@
…
> +static void rocket_gem_bo_free(struct drm_gem_object *obj)
> +{
…
> +	mutex_lock(&rdev->iommu_lock);
> +
> +	sgt = drm_gem_shmem_get_pages_sgt(&bo->base);
…
> +	drm_gem_shmem_free(&bo->base);
> +
> +	mutex_unlock(&rdev->iommu_lock);
> +}
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&rdev->iommu_lock);”?
https://elixir.bootlin.com/linux/v6.15/source/include/linux/mutex.h#L201

Regards,
Markus