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.
v2: Don't depend on COMPILE_TEST
Reviewed-by: Hamza Mahfooz <hamza.mahf...@amd.com> # v1
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/Kconfig | 13 +++++++++++++
drivers/gpu/drm/Makefile | 3 +++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 6e853acf15da..c08e18108c2a 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -416,3 +416,16 @@ config DRM_LIB_RANDOM
config DRM_PRIVACY_SCREEN
bool
default n
+
+config DRM_WERROR
+ bool "Compile the drm subsystem with warnings as errors"
+ depends on EXPERT
+ 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 ea456f057e8a..a73c04d2d7a3 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -30,6 +30,9 @@ 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
