drm/i915: use upstream version of header tests

Throw out our local hacks of header tests now that the more generic
kbuild versions are upstream.

At least for now, continue to keep the header tests behind
CONFIG_DRM_I915_WERROR=y knob.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190729140847.18557-1-jani.nikula@intel.com

drivers/gpu/drm/i915/Kconfig.debug

@@ -7,6 +7,7 @@ config DRM_I915_WERROR
         # We use the dependency on !COMPILE_TEST to not be enabled in
         # allmodconfig or allyesconfig configurations
         depends on !COMPILE_TEST
+	select HEADER_TEST
         default n
         help
           Add -Werror to the build flags for (and only for) i915.ko.

drivers/gpu/drm/i915/Makefile

@@ -33,7 +33,7 @@ subdir-ccflags-y += \
 	$(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
 
 # Extra header tests
-include $(src)/Makefile.header-test
+header-test-pattern-$(CONFIG_DRM_I915_WERROR) := *.h
 
 subdir-ccflags-y += -I$(srctree)/$(src)
 

drivers/gpu/drm/i915/Makefile.header-test

-# SPDX-License-Identifier: MIT
-# Copyright © 2019 Intel Corporation
-
-# Test the headers are compilable as standalone units
-header-test-$(CONFIG_DRM_I915_WERROR) := \
-	i915_active_types.h \
-	i915_debugfs.h \
-	i915_drv.h \
-	i915_fixed.h \
-	i915_gem_gtt.h \
-	i915_globals.h \
-	i915_irq.h \
-	i915_params.h \
-	i915_priolist_types.h \
-	i915_pvinfo.h \
-	i915_reg.h \
-	i915_scheduler_types.h \
-	i915_utils.h \
-	i915_vgpu.h \
-	intel_csr.h \
-	intel_drv.h \
-	intel_gvt.h \
-	intel_pm.h \
-	intel_runtime_pm.h \
-	intel_sideband.h \
-	intel_uncore.h \
-	intel_wakeref.h

drivers/gpu/drm/i915/display/Makefile

@@ -2,4 +2,5 @@
 subdir-ccflags-y += -I$(srctree)/$(src)/..
 
 # Extra header tests
-include $(src)/Makefile.header-test
+header-test-pattern-$(CONFIG_DRM_I915_WERROR) := *.h
+header-test- := intel_vbt_defs.h

drivers/gpu/drm/i915/display/Makefile.header-test

-# SPDX-License-Identifier: MIT
-# Copyright © 2019 Intel Corporation
-
-# Test the headers are compilable as standalone units
-header_test := $(notdir $(filter-out %/intel_vbt_defs.h,$(wildcard $(src)/*.h)))
-
-quiet_cmd_header_test = HDRTEST $@
-      cmd_header_test = echo "\#include \"$(<F)\"" > $@
-
-header_test_%.c: %.h
-	$(call cmd,header_test)
-
-extra-$(CONFIG_DRM_I915_WERROR) += \
-	$(foreach h,$(header_test),$(patsubst %.h,header_test_%.o,$(h)))
-
-clean-files += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.c,$(h)))

drivers/gpu/drm/i915/gem/Makefile

@@ -2,4 +2,4 @@
 subdir-ccflags-y += -I$(srctree)/$(src)/..
 
 # Extra header tests
-include $(src)/Makefile.header-test
+header-test-pattern-$(CONFIG_DRM_I915_WERROR) := *.h

drivers/gpu/drm/i915/gem/Makefile.header-test

-# SPDX-License-Identifier: MIT
-# Copyright © 2019 Intel Corporation
-
-# Test the headers are compilable as standalone units
-header_test := $(notdir $(wildcard $(src)/*.h))
-
-quiet_cmd_header_test = HDRTEST $@
-      cmd_header_test = echo "\#include \"$(<F)\"" > $@
-
-header_test_%.c: %.h
-	$(call cmd,header_test)
-
-extra-$(CONFIG_DRM_I915_WERROR) += \
-	$(foreach h,$(header_test),$(patsubst %.h,header_test_%.o,$(h)))
-
-clean-files += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.c,$(h)))

drivers/gpu/drm/i915/gt/Makefile

@@ -2,4 +2,4 @@
 subdir-ccflags-y += -I$(srctree)/$(src)/..
 
 # Extra header tests
-include $(src)/Makefile.header-test
+header-test-pattern-$(CONFIG_DRM_I915_WERROR) := *.h

drivers/gpu/drm/i915/gt/Makefile.header-test

-# SPDX-License-Identifier: MIT
-# Copyright © 2019 Intel Corporation
-
-# Test the headers are compilable as standalone units
-header_test := $(notdir $(wildcard $(src)/*.h))
-
-quiet_cmd_header_test = HDRTEST $@
-      cmd_header_test = echo "\#include \"$(<F)\"" > $@
-
-header_test_%.c: %.h
-	$(call cmd,header_test)
-
-extra-$(CONFIG_DRM_I915_WERROR) += \
-	$(foreach h,$(header_test),$(patsubst %.h,header_test_%.o,$(h)))
-
-clean-files += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.c,$(h)))

drivers/gpu/drm/i915/gt/uc/Makefile

@@ -2,4 +2,4 @@
 subdir-ccflags-y += -I$(srctree)/$(src)/../..
 
 # Extra header tests
-include $(src)/Makefile.header-test
+header-test-pattern-$(CONFIG_DRM_I915_WERROR) := *.h

drivers/gpu/drm/i915/gt/uc/Makefile.header-test

-# SPDX-License-Identifier: MIT
-# Copyright © 2019 Intel Corporation
-
-# Test the headers are compilable as standalone units
-header_test := $(notdir $(wildcard $(src)/*.h))
-
-quiet_cmd_header_test = HDRTEST $@
-      cmd_header_test = echo "\#include \"$(<F)\"" > $@
-
-header_test_%.c: %.h
-	$(call cmd,header_test)
-
-extra-$(CONFIG_DRM_I915_WERROR) += \
-	$(foreach h,$(header_test),$(patsubst %.h,header_test_%.o,$(h)))
-
-clean-files += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.c,$(h)))