Ensure drm headers build, are self-contained, have header guards, and have no kernel-doc warnings, when CONFIG_DRM_HEADER_TEST=y. The mechanism follows similar patters used in i915, xe, and usr/include. To cover include/drm, we need to recurse there using the top level Kbuild and the new include/Kbuild files. v4: check for CONFIG_WERROR in addition to CONFIG_DRM_WERROR v3: adapt to upstream build changes v2: make DRM_HEADER_TEST depend on DRM Suggested-by: Daniel Vetter <daniel@xxxxxxxx> Cc: David Airlie <airlied@xxxxxxxxx> Cc: Daniel Vetter <daniel@xxxxxxxx> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> Cc: Maxime Ripard <mripard@xxxxxxxxxx> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx> Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- Kbuild | 1 + drivers/gpu/drm/Kconfig | 11 +++++++++++ drivers/gpu/drm/Makefile | 18 ++++++++++++++++++ include/Kbuild | 1 + include/drm/Makefile | 18 ++++++++++++++++++ 5 files changed, 49 insertions(+) create mode 100644 include/Kbuild create mode 100644 include/drm/Makefile diff --git a/Kbuild b/Kbuild index 464b34a08f51..f327ca86990c 100644 --- a/Kbuild +++ b/Kbuild @@ -97,3 +97,4 @@ obj-$(CONFIG_SAMPLES) += samples/ obj-$(CONFIG_NET) += net/ obj-y += virt/ obj-y += $(ARCH_DRIVERS) +obj-$(CONFIG_DRM_HEADER_TEST) += include/ diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 0387143bbb39..1f3a22df9309 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -476,6 +476,17 @@ config DRM_WERROR If in doubt, say N. +config DRM_HEADER_TEST + bool "Ensure DRM headers are self-contained and pass kernel-doc" + depends on DRM && EXPERT + default n + help + Ensure the DRM subsystem headers both under drivers/gpu/drm and + include/drm compile, are self-contained, have header guards, and have + no kernel-doc warnings. + + If in doubt, say N. + endif # Separate option because drm_panel_orientation_quirks.c is shared with fbdev diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 68cc9258ffc4..c199075c87a4 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -219,3 +219,21 @@ obj-y += solomon/ obj-$(CONFIG_DRM_SPRD) += sprd/ obj-$(CONFIG_DRM_LOONGSON) += loongson/ obj-$(CONFIG_DRM_POWERVR) += imagination/ + +# Ensure drm headers are self-contained and pass kernel-doc +hdrtest-files := \ + $(shell cd $(src) && find . -maxdepth 1 -name 'drm_*.h') \ + $(shell cd $(src) && find display lib -name '*.h') + +always-$(CONFIG_DRM_HEADER_TEST) += \ + $(patsubst %.h,%.hdrtest, $(hdrtest-files)) + +# Include the header twice to detect missing include guard. +quiet_cmd_hdrtest = HDRTEST $(patsubst %.hdrtest,%.h,$@) + cmd_hdrtest = \ + $(CC) $(c_flags) -fsyntax-only -x c /dev/null -include $< -include $<; \ + $(srctree)/scripts/kernel-doc -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \ + touch $@ + +$(obj)/%.hdrtest: $(src)/%.h FORCE + $(call if_changed_dep,hdrtest) diff --git a/include/Kbuild b/include/Kbuild new file mode 100644 index 000000000000..5e76a599e2dd --- /dev/null +++ b/include/Kbuild @@ -0,0 +1 @@ +obj-$(CONFIG_DRM_HEADER_TEST) += drm/ diff --git a/include/drm/Makefile b/include/drm/Makefile new file mode 100644 index 000000000000..a7bd15d2803e --- /dev/null +++ b/include/drm/Makefile @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 + +# Ensure drm headers are self-contained and pass kernel-doc +hdrtest-files := \ + $(shell cd $(src) && find * -name '*.h' 2>/dev/null) + +always-$(CONFIG_DRM_HEADER_TEST) += \ + $(patsubst %.h,%.hdrtest, $(hdrtest-files)) + +# Include the header twice to detect missing include guard. +quiet_cmd_hdrtest = HDRTEST $(patsubst %.hdrtest,%.h,$@) + cmd_hdrtest = \ + $(CC) $(c_flags) -fsyntax-only -x c /dev/null -include $< -include $<; \ + $(srctree)/scripts/kernel-doc -none $(if $(CONFIG_WERROR)$(CONFIG_DRM_WERROR),-Werror) $<; \ + touch $@ + +$(obj)/%.hdrtest: $(src)/%.h FORCE + $(call if_changed_dep,hdrtest) -- 2.39.2
