[PATCH v2 3/3] drm: enable warnings on unused static inlines

[Jani Nikula]

We enable most W=1 warnings by default subsystem wide. Also enable
warnings on unused static inlines when building with clang.

See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
inline functions for W=1 build").

Cc: Nathan Chancellor <nathan at kernel.org>
Tested-by: Nathan Chancellor <nathan at kernel.org> # build
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 1677c1f335fb..73b3b3dbc27e 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -19,6 +19,9 @@ subdir-ccflags-y += $(call cc-option, -Wformat-overflow)
 # FIXME: fix -Wformat-truncation warnings and uncomment
 #subdir-ccflags-y += $(call cc-option, -Wformat-truncation)
 subdir-ccflags-y += $(call cc-option, -Wstringop-truncation)
+
+subdir-ccflags-y += -DKBUILD_EXTRA_WARN1
+
 # The following turn off the warnings enabled by -Wextra
 ifeq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
 subdir-ccflags-y += -Wno-missing-field-initializers
-- 
2.39.5