Force GCC to throw an error instead of a warning when compiling

configname: CONFIG_DRM_I915_WERROR

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>drm/i915 Debugging
└─>Force GCC to throw an error instead of a warning when compiling
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Add -Werror to the build flags for (and only for) i915.ko.
Do not enable this unless you are writing code for the i915.ko module.

Recommended for driver developers only.

If in doubt, say "N".

depends
CONFIG_DRM_I915
CONFIG_EXPERT
CONFIG_HAS_IOMEM
NOT CONFIG_COMPILE_TEST

is depended by
CONFIG_DRM_I915_DEBUG