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 <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: jnikula

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

@@ -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

@@ -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/display/Makefile.header-test

@@ -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

@@ -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