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

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Hi all,

After merging the drm-misc tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/gpu/drm/qxl/qxl_display.c: In function 'qxl_display_read_client_monitors_config':
include/drm/drm_modeset_lock.h:167:7: error: implicit declaration of function 'drm_drv_uses_atomic_modeset' [-Werror=implicit-function-declaration]
  167 |  if (!drm_drv_uses_atomic_modeset(dev))    \
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:187:2: note: in expansion of macro 'DRM_MODESET_LOCK_ALL_BEGIN'
  187 |  DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:189:35: error: macro "DRM_MODESET_LOCK_ALL_END" requires 3 arguments, but only 2 given
  189 |  DRM_MODESET_LOCK_ALL_END(ctx, ret);
      |                                   ^
In file included from include/drm/drm_crtc.h:36,
                 from include/drm/drm_atomic.h:31,
                 from drivers/gpu/drm/qxl/qxl_display.c:29:
include/drm/drm_modeset_lock.h:194: note: macro "DRM_MODESET_LOCK_ALL_END" defined here
  194 | #define DRM_MODESET_LOCK_ALL_END(dev, ctx, ret)    \
      | 
drivers/gpu/drm/qxl/qxl_display.c:189:2: error: 'DRM_MODESET_LOCK_ALL_END' undeclared (first use in this function)
  189 |  DRM_MODESET_LOCK_ALL_END(ctx, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:189:2: note: each undeclared identifier is reported only once for each function it appears in
drivers/gpu/drm/qxl/qxl_display.c:187:2: error: label 'modeset_lock_fail' used but not defined
  187 |  DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/drm/drm_crtc.h:36,
                 from include/drm/drm_atomic.h:31,
                 from drivers/gpu/drm/qxl/qxl_display.c:29:
include/drm/drm_modeset_lock.h:170:1: warning: label 'modeset_lock_retry' defined but not used [-Wunused-label]
  170 | modeset_lock_retry:       \
      | ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:187:2: note: in expansion of macro 'DRM_MODESET_LOCK_ALL_BEGIN'
  187 |  DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c: In function 'qxl_framebuffer_surface_dirty':
drivers/gpu/drm/qxl/qxl_display.c:434:35: error: macro "DRM_MODESET_LOCK_ALL_END" requires 3 arguments, but only 2 given
  434 |  DRM_MODESET_LOCK_ALL_END(ctx, ret);
      |                                   ^
In file included from include/drm/drm_crtc.h:36,
                 from include/drm/drm_atomic.h:31,
                 from drivers/gpu/drm/qxl/qxl_display.c:29:
include/drm/drm_modeset_lock.h:194: note: macro "DRM_MODESET_LOCK_ALL_END" defined here
  194 | #define DRM_MODESET_LOCK_ALL_END(dev, ctx, ret)    \
      | 
drivers/gpu/drm/qxl/qxl_display.c:434:2: error: 'DRM_MODESET_LOCK_ALL_END' undeclared (first use in this function)
  434 |  DRM_MODESET_LOCK_ALL_END(ctx, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:411:2: error: label 'modeset_lock_fail' used but not defined
  411 |  DRM_MODESET_LOCK_ALL_BEGIN(fb->dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/drm/drm_crtc.h:36,
                 from include/drm/drm_atomic.h:31,
                 from drivers/gpu/drm/qxl/qxl_display.c:29:
include/drm/drm_modeset_lock.h:170:1: warning: label 'modeset_lock_retry' defined but not used [-Wunused-label]
  170 | modeset_lock_retry:       \
      | ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/qxl/qxl_display.c:411:2: note: in expansion of macro 'DRM_MODESET_LOCK_ALL_BEGIN'
  411 |  DRM_MODESET_LOCK_ALL_BEGIN(fb->dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~

Caused by commit

  bbaac1354cc9 ("drm/qxl: Replace deprecated function in qxl_display")

interacting with commit

  77ef38574beb ("drm/modeset-lock: Take the modeset BKL for legacy drivers")

from the drm-misc-fixes tree.

drivers/gpu/drm/qxl/qxl_display.c manages to include
drm/drm_modeset_lock.h by some indirect route, but fails to have
drm/drm_drv.h similarly included.  In fact, drm/drm_modeset_lock.h should
have included drm/drm_drv.h since it uses things declared there, and
drivers/gpu/drm/qxl/qxl_display.c should include drm/drm_modeset_lock.h
similarly.

I have added the following hack patch for today.

From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Wed, 26 Aug 2020 10:40:18 +1000
Subject: [PATCH] fix interaction with drm-misc-fix commit

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/qxl/qxl_display.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index fa79688013b7..6063f3a15329 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -26,6 +26,7 @@
 #include <linux/crc32.h>
 #include <linux/delay.h>
 
+#include <drm/drm_drv.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
@@ -186,7 +187,7 @@ void qxl_display_read_client_monitors_config(struct qxl_device *qdev)
 
 	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
 	qxl_update_offset_props(qdev);
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 	if (!drm_helper_hpd_irq_event(dev)) {
 		/* notify that the monitor configuration changed, to
 		   adjust at the arbitrary resolution */
@@ -431,7 +432,7 @@ static int qxl_framebuffer_surface_dirty(struct drm_framebuffer *fb,
 			  clips, num_clips, inc, 0);
 
 out_lock_end:
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(fb->dev, ctx, ret);
 
 	return 0;
 }
-- 
2.28.0

-- 
Cheers,
Stephen Rothwell

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