Commit b47bcb93 authored Feb 29, 2016 by Christian König Committed by Daniel Vetter Mar 21, 2016

dma-buf/fence: fix fence_is_later v2



A fence is never later than itself. This caused a bunch of overhead for AMDGPU.

v2: simplify check as suggested by Michel.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 87e332d5

include/linux/fence.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -292,7 +292,7 @@ static inline bool fence_is_later(struct fence f1, struct fence f2)
	if (WARN_ON(f1->context != f2->context))		if (WARN_ON(f1->context != f2->context))
	return false;		return false;

	return f1->seqno - f2->seqno < INT_MAX;		return (int)(f1->seqno - f2->seqno) > 0;
	}		}

	/**		/**