From: Grigori Goronzy <greg@chown.ath.cx>
Date: Thu, 2 Jul 2015 23:54:10 +0000 (+0200)
Subject: drm/radeon: use RCU query for GEM_BUSY syscall
X-Git-Tag: omap-for-v4.2/fixes-rc2-v2~18^2~3^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=828202a382a06eda74202d4888d01a1078c68922;p=pandora-kernel.git

drm/radeon: use RCU query for GEM_BUSY syscall

We don't need to call the (expensive) radeon_bo_wait, checking the
fences via RCU is much faster. The reservation done by radeon_bo_wait
does not save us from any race conditions.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Grigori Goronzy <greg@chown.ath.cx>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

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