[Intel-gfx] [PATCH v2] drm/i915: enable kernel-doc warnings for CONFIG_DRM_I915_WERROR=y

[Jani Nikula <jani.nikula@intel.com>]

Increase awareness of kernel-doc issues by enabling doc check locally
when CONFIG_DRM_I915_WERROR=y is enabled.

Once the warnings have been fixed, we can pass -Werror to kernel-doc
locally, and fail the build when there are kernel-doc warnings in i915.

v2: Don't check for KBUILD_EXTRA_WARN (Masahiro)

Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/Makefile | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 057ef22fa9c6..831e42175165 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -369,6 +369,13 @@ include $(src)/gvt/Makefile
 obj-$(CONFIG_DRM_I915) += i915.o
 obj-$(CONFIG_DRM_I915_GVT_KVMGT) += kvmgt.o
 
+# kernel-doc test
+#
+# Enable locally for CONFIG_DRM_I915_WERROR=y. See also scripts/Makefile.build
+ifdef CONFIG_DRM_I915_WERROR
+    cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
+endif
+
 # header test
 
 # exclude some broken headers from the test coverage
-- 
2.39.2