Hi Dave,

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

drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c: In function 'amdgpu_gem_userptr_ioctl':
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c:321:2: error: implicit declaration of function 'release_pages' [-Werror=implicit-function-declaration]
   release_pages(bo->tbo.ttm->pages, bo->tbo.ttm->num_pages, false);
   ^
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c: In function 'amdgpu_cs_parser_bos':
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:410:5: error: implicit declaration of function 'release_pages' [-Werror=implicit-function-declaration]
      release_pages(e->user_pages,
      ^

Caused by commit

   2f568dbd6b94 ("drm/amdgpu: move get_user_pages out of amdgpu_ttm_tt_pin_userptr v6")

Presumably a forgotten include file.

I added this fix patch for today:

From: Stephen Rothwell <redacted>
Date: Thu, 17 Mar 2016 15:30:49 +1100
Subject: [PATCH] drm/amdgpu: release_pages requires linux/pagemap.h

Signed-off-by: Stephen Rothwell <redacted>
---
  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 1 +
  drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 1 +
  2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 4f5ef4149e87..9392e50a7ba4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -25,6 +25,7 @@
   *    Jerome Glisse <glisse@freedesktop.org>
   */
  #include <linux/list_sort.h>
+#include <linux/pagemap.h>
  #include <drm/drmP.h>
  #include <drm/amdgpu_drm.h>
  #include "amdgpu.h"

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 1ecdf6c01368..0f2391ec1ed9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c

@@ -26,6 +26,7 @@
   *          Jerome Glisse
   */
  #include <linux/ktime.h>
+#include <linux/pagemap.h>
  #include <drm/drmP.h>
  #include <drm/amdgpu_drm.h>
  #include "amdgpu.h"