[Intel-gfx] [PATCH 1/2] drm/i915: Disable -Woverride-init

[Chris Wilson]

We commonly use an inheritance style approach to device parameters,
where later generations inherit the defaults from earlier generations
and then override settings that change. For example, in i915_pci.c
BDW_FEATURES pulls in HSW_FEATURES, makes a few changes for 48bit
contexts and then individual Broadwell stanzas make further adjustments
for different GT configs.

This causes a lot of warnings with make W=1 from -Woverride-init. We
could use
	#pragma GCC diagnostic push
	#pragma GCC diagnostic ignored "-Woverride-init"
	...
	#pragma GCC diagnostic pop
around the offenders, but the pattern is used frequently enough in the
driver to prefer just disabling the warning entirely.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Tomi Sarvela <tomi.p.sarvela at intel.com>
---
 drivers/gpu/drm/i915/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 91136b425f77..24cc3c7f814d 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -2,7 +2,8 @@
 # Makefile for the drm device driver.  This driver provides support for the
 # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
 
-subdir-ccflags-$(CONFIG_DRM_I915_WERROR) := -Werror
+subdir-ccflags-y := -Wno-override-init # used frequently for "inheritance"
+subdir-ccflags-$(CONFIG_DRM_I915_WERROR) += -Werror
 subdir-ccflags-$(CONFIG_DRM_I915_SELFTEST) += -I$(src) -I$(src)/selftests
 subdir-ccflags-y += \
 	$(call as-instr,movntdqa (%eax)$(comma)%xmm0,-DCONFIG_AS_MOVNTDQA)
-- 
2.11.0