[PATCH 1/5] drm/i915: Remove unecessary dma_fence_ops

[Emil Velikov]

Hi Daniel,

On 4 July 2018 at 10:29, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> dma_fence_default_wait is the default now, same for the trivial
> enable_signaling implementation.
>
> v2: Also remove the relase hook, dma_fence_free is the default.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Jani Nikula <jani.nikula at linux.intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Colin Ian King <colin.king at canonical.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Mika Kuoppala <mika.kuoppala at intel.com>
> Cc: intel-gfx at lists.freedesktop.org
> ---
>  drivers/gpu/drm/i915/i915_gem_clflush.c        | 7 -------
>  drivers/gpu/drm/i915/selftests/i915_sw_fence.c | 8 --------
>  2 files changed, 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_clflush.c b/drivers/gpu/drm/i915/i915_gem_clflush.c
> index f5c570d35b2a..8e74c23cbd91 100644
> --- a/drivers/gpu/drm/i915/i915_gem_clflush.c
> +++ b/drivers/gpu/drm/i915/i915_gem_clflush.c
> @@ -45,11 +45,6 @@ static const char *i915_clflush_get_timeline_name(struct dma_fence *fence)
>         return "clflush";
>  }
>
> -static bool i915_clflush_enable_signaling(struct dma_fence *fence)
> -{
> -       return true;
> -}
> -
>  static void i915_clflush_release(struct dma_fence *fence)
>  {
>         struct clflush *clflush = container_of(fence, typeof(*clflush), dma);
> @@ -63,8 +58,6 @@ static void i915_clflush_release(struct dma_fence *fence)
>  static const struct dma_fence_ops i915_clflush_ops = {
>         .get_driver_name = i915_clflush_get_driver_name,
>         .get_timeline_name = i915_clflush_get_timeline_name,
> -       .enable_signaling = i915_clflush_enable_signaling,
>From a quick look through drm-misc/drm-misc-next removing the
enable_signalling hook may cause functional changes.

Namely:
A call to trace_dma_fence_enable_signal() (in
dma_fence_enable_sw_signaling(), dma_fence_add_callback() and others)
will be omitted.

Removing the default .wait and .release hooks is fine.

HTH
Emil