linux-kernel - [PATCH -mm] fixup "Decouple build from userspace headers"

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Date:   Fri, 16 Jul 2021 00:15:14 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, arnd@...db.de, masahiroy@...nel.org,
        hch@...radead.org
Subject: [PATCH -mm] fixup "Decouple build from userspace headers"

Allow to find SIMD headers where necessary.

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

	fold into decouple-build-from-userspace-headers.patch

 arch/arm64/lib/Makefile   |    2 +-
 arch/powerpc/lib/Makefile |    2 +-
 lib/raid6/Makefile        |    4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -8,7 +8,7 @@ lib-y		:= clear_user.o delay.o copy_from_user.o		\
 ifeq ($(CONFIG_KERNEL_MODE_NEON), y)
 obj-$(CONFIG_XOR_BLOCKS)	+= xor-neon.o
 CFLAGS_REMOVE_xor-neon.o	+= -mgeneral-regs-only
-CFLAGS_xor-neon.o		+= -ffreestanding
+CFLAGS_xor-neon.o		+= -ffreestanding -isystem $(shell $(CC) -print-file-name=include)
 endif
 
 lib-$(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) += uaccess_flushcache.o
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -64,6 +64,6 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o
 obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o
 
 obj-$(CONFIG_ALTIVEC)	+= xor_vmx.o xor_vmx_glue.o
-CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec)
+CFLAGS_xor_vmx.o += -maltivec $(call cc-option,-mabi=altivec) -isystem $(shell $(CC) -print-file-name=include)
 
 obj-$(CONFIG_PPC64) += $(obj64-y)
--- a/lib/raid6/Makefile
+++ b/lib/raid6/Makefile
@@ -13,7 +13,7 @@ raid6_pq-$(CONFIG_S390) += s390vx8.o recov_s390xc.o
 hostprogs	+= mktables
 
 ifeq ($(CONFIG_ALTIVEC),y)
-altivec_flags := -maltivec $(call cc-option,-mabi=altivec)
+altivec_flags := -maltivec $(call cc-option,-mabi=altivec) -isystem $(shell $(CC) -print-file-name=include)
 
 ifdef CONFIG_CC_IS_CLANG
 # clang ppc port does not yet support -maltivec when -msoft-float is
@@ -33,7 +33,7 @@ endif
 # The GCC option -ffreestanding is required in order to compile code containing
 # ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel)
 ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
-NEON_FLAGS := -ffreestanding
+NEON_FLAGS := -ffreestanding -isystem $(shell $(CC) -print-file-name=include)
 ifeq ($(ARCH),arm)
 NEON_FLAGS += -march=armv7-a -mfloat-abi=softfp -mfpu=neon
 endif