From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Thu, 14 Jun 2018 07:29:22 +0000 (+0200)
Subject: drm: Change deadlock-avoidance algorithm for the modeset locks.
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=07c13bb78c8b8a9cb6ee169659528945038d5e85;p=linux.git

drm: Change deadlock-avoidance algorithm for the modeset locks.

For modeset locks we don't expect a high number of contending
transactions so change algorithm from Wait-Die to Wound-Wait.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index 638be2eb67b44..8a5100685875a 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -70,7 +70,7 @@
  * lists and lookup data structures.
  */
 
-static DEFINE_WD_CLASS(crtc_ww_class);
+static DEFINE_WW_CLASS(crtc_ww_class);
 
 /**
  * drm_modeset_lock_all - take all modeset locks