Subject: linux-next: build failure after merge of the drm tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 31 Dec 2015 21:31:24 +1100

Hi Dave,

After merging the drm tree, today's linux-next build (powerpc
allyesconfig) failed like this:

drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/tonga_thermal.c: In function 'tonga_fan_ctrl_get_fan_speed_percent':
drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/tonga_thermal.c:84:2: error: implicit declaration of function 'do_div' [-Werror=implicit-function-declaration]
  do_div(tmp64, duty100);
  ^
drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/fiji_thermal.c: In function 'fiji_fan_ctrl_get_fan_speed_percent':
drivers/gpu/drm/amd/amdgpu/../powerplay/hwmgr/fiji_thermal.c:78:2: error: implicit declaration of function 'do_div' [-Werror=implicit-function-declaration]
  do_div(tmp64, duty100);
  ^

Caused by commit

  1e4854e96c35 ("drm/amdgpu/powerplay: implement thermal control for tonga.")

[I notice that that commit does not have a Signed-off-by from its
committer (Alex)]

I applied the following fix patch for today:

From: Stephen Rothwell <[email-masked]>
Date: Thu, 31 Dec 2015 21:20:20 +1100
Subject: [PATCH] drm/amdgpu/powerplay: include asm/div64.h for do_div()

Fixes: 1e4854e96c35 ("drm/amdgpu/powerplay: implement thermal control for tonga.")
Signed-off-by: Stephen Rothwell <[email-masked]>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/fiji_thermal.c  | 2 +-
 drivers/gpu/drm/amd/powerplay/hwmgr/tonga_thermal.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_thermal.c
index def57d0675ed..e76a7de9aa32 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/fiji_thermal.c
@@ -20,7 +20,7 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */
-
+#include <asm/div64.h>
 #include "fiji_thermal.h"
 #include "fiji_hwmgr.h"
 #include "fiji_smumgr.h"
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_thermal.c
index 2e159b003e71..a188174747c9 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_thermal.c
@@ -20,7 +20,7 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  */
-
+#include <asm/div64.h>
 #include "tonga_thermal.h"
 #include "tonga_hwmgr.h"
 #include "tonga_smumgr.h"
-- 
2.6.4

-- 
Cheers,
Stephen Rothwell                    [email-masked]