Add kconfig to enable -Werror subsystem wide. This is useful for development and CI to keep the subsystem warning free, while avoiding issues outside of the subsystem that kernel wide CONFIG_WERROR=y might hit. Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- drivers/gpu/drm/Kconfig | 18 ++++++++++++++++++ drivers/gpu/drm/Makefile | 3 +++ 2 files changed, 21 insertions(+) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 6ec33d36f3a4..36a00cba2540 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -414,3 +414,21 @@ config DRM_LIB_RANDOM config DRM_PRIVACY_SCREEN bool default n + +config DRM_WERROR + bool "Compile the drm subsystem with warnings as errors" + # As this may inadvertently break the build, only allow the user + # to shoot oneself in the foot iff they aim really hard + depends on EXPERT + # We use the dependency on !COMPILE_TEST to not be enabled in + # allmodconfig or allyesconfig configurations + depends on !COMPILE_TEST + default n + help + A kernel build should not cause any compiler warnings, and this + enables the '-Werror' flag to enforce that rule in the drm subsystem. + + The drm subsystem enables more warnings than the kernel default, so + this config option is disabled by default. + + If in doubt, say N. diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 8b6be830f7c3..b7fd3e58b7af 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -32,6 +32,9 @@ subdir-ccflags-y += -Wno-sign-compare endif # --- end copy-paste +# Enable -Werror in CI and development +subdir-ccflags-$(CONFIG_DRM_WERROR) += -Werror + drm-y := \ drm_aperture.o \ drm_atomic.o \ -- 2.39.2
