Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/fix-kbuild

KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)

# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments

KBUILD_CPPFLAGS += $(CPPFLAGS)

KBUILD_AFLAGS   += $(AFLAGS)

KBUILD_CFLAGS   += $(CFLAGS)

# But warn user when we do so

warn-assign = \

$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")

ifneq ($(KCPPFLAGS),)

        $(call warn-assign,CPPFLAGS)

        KBUILD_CPPFLAGS += $(KCPPFLAGS)

endif

ifneq ($(KAFLAGS),)

        $(call warn-assign,AFLAGS)

        KBUILD_AFLAGS += $(KAFLAGS)

endif

ifneq ($(KCFLAGS),)

        $(call warn-assign,CFLAGS)

        KBUILD_CFLAGS += $(KCFLAGS)

endif

# Use --build-id when available.

LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\