[PATCH 01/13] drm/i915/bdw+: Replace list_del+list_add_tail with list_move_tail

Tvrtko Ursulin
2016-01-08T11:29:57Z

From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Same effect for slightly less source code and resulting binary.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/intel_lrc.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 23839ff04e27..8b6071fcd743 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -431,9 +431,8 @@ static void execlists_context_unqueue(struct intel_engine_cs *ring)
/* Same ctx: ignore first request, as second request
* will update tail past first request's workload */
cursor->elsp_submitted = req0->elsp_submitted;
- list_del(&req0->execlist_link);
- list_add_tail(&req0->execlist_link,
- &ring->execlist_retired_req_list);
+ list_move_tail(&req0->execlist_link,
+ &ring->execlist_retired_req_list);
req0 = cursor;
} else {
req1 = cursor;
@@ -485,9 +484,8 @@ static bool execlists_check_remove_request(struct intel_engine_cs *ring,
"Never submitted head request\n");

if (--head_req->elsp_submitted <= 0) {
- list_del(&head_req->execlist_link);
- list_add_tail(&head_req->execlist_link,
- &ring->execlist_retired_req_list);
+ list_move_tail(&head_req->execlist_link,
+ &ring->execlist_retired_req_list);
return true;
}
}
@@ -608,9 +606,8 @@ static int execlists_context_queue(struct drm_i915_gem_request *request)
if (request->ctx == tail_req->ctx) {
WARN(tail_req->elsp_submitted != 0,
"More than 2 already-submitted reqs queued\n");
- list_del(&tail_req->execlist_link);
- list_add_tail(&tail_req->execlist_link,
- &ring->execlist_retired_req_list);
+ list_move_tail(&tail_req->execlist_link,
+ &ring->execlist_retired_req_list);
}
}

--
1.9.1