Patch "isystem: delete global -isystem compile option" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    isystem: delete global -isystem compile option

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     isystem-delete-global-isystem-compile-option.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 35d3afe2e727a724d1a96b72b77cace2bbf367ae
Author: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Date:   Mon Aug 2 23:43:15 2021 +0300

    isystem: delete global -isystem compile option
    
    [ Upstream commit 04e85bbf71c9072dcf0ad9a7150495d72461105c ]
    
    Further isolate kernel from userspace, prevent accidental inclusion of
    undesireable headers, mainly float.h and stdatomic.h.
    
    nds32 keeps -isystem globally due to intrinsics used in entrenched header.
    
    -isystem is selectively reenabled for some files, again, for intrinsics.
    
    Compile tested on:
    
    hexagon-defconfig hexagon-allmodconfig
    alpha-allmodconfig alpha-allnoconfig alpha-defconfig arm64-allmodconfig
    arm64-allnoconfig arm64-defconfig arm-am200epdkit arm-aspeed_g4
    arm-aspeed_g5 arm-assabet arm-at91_dt arm-axm55xx arm-badge4 arm-bcm2835
    arm-cerfcube arm-clps711x arm-cm_x300 arm-cns3420vb arm-colibri_pxa270
    arm-colibri_pxa300 arm-collie arm-corgi arm-davinci_all arm-dove
    arm-ep93xx arm-eseries_pxa arm-exynos arm-ezx arm-footbridge arm-gemini
    arm-h3600 arm-h5000 arm-hackkit arm-hisi arm-imote2 arm-imx_v4_v5
    arm-imx_v6_v7 arm-integrator arm-iop32x arm-ixp4xx arm-jornada720
    arm-keystone arm-lart arm-lpc18xx arm-lpc32xx arm-lpd270 arm-lubbock
    arm-magician arm-mainstone arm-milbeaut_m10v arm-mini2440 arm-mmp2
    arm-moxart arm-mps2 arm-multi_v4t arm-multi_v5 arm-multi_v7 arm-mv78xx0
    arm-mvebu_v5 arm-mvebu_v7 arm-mxs arm-neponset arm-netwinder arm-nhk8815
    arm-omap1 arm-omap2plus arm-orion5x arm-oxnas_v6 arm-palmz72 arm-pcm027
    arm-pleb arm-pxa arm-pxa168 arm-pxa255-idp arm-pxa3xx arm-pxa910
    arm-qcom arm-realview arm-rpc arm-s3c2410 arm-s3c6400 arm-s5pv210
    arm-sama5 arm-shannon arm-shmobile arm-simpad arm-socfpga arm-spear13xx
    arm-spear3xx arm-spear6xx arm-spitz arm-stm32 arm-sunxi arm-tct_hammer
    arm-tegra arm-trizeps4 arm-u8500 arm-versatile arm-vexpress arm-vf610m4
    arm-viper arm-vt8500_v6_v7 arm-xcep arm-zeus csky-allmodconfig
    csky-allnoconfig csky-defconfig h8300-edosk2674 h8300-h8300h-sim
    h8300-h8s-sim i386-allmodconfig i386-allnoconfig i386-defconfig
    ia64-allmodconfig ia64-allnoconfig ia64-bigsur ia64-generic ia64-gensparse
    ia64-tiger ia64-zx1 m68k-amcore m68k-amiga m68k-apollo m68k-atari
    m68k-bvme6000 m68k-hp300 m68k-m5208evb m68k-m5249evb m68k-m5272c3
    m68k-m5275evb m68k-m5307c3 m68k-m5407c3 m68k-m5475evb m68k-mac
    m68k-multi m68k-mvme147 m68k-mvme16x m68k-q40 m68k-stmark2 m68k-sun3
    m68k-sun3x microblaze-allmodconfig microblaze-allnoconfig microblaze-mmu
    mips-ar7 mips-ath25 mips-ath79 mips-bcm47xx mips-bcm63xx mips-bigsur
    mips-bmips_be mips-bmips_stb mips-capcella mips-cavium_octeon mips-ci20
    mips-cobalt mips-cu1000-neo mips-cu1830-neo mips-db1xxx mips-decstation
    mips-decstation_64 mips-decstation_r4k mips-e55 mips-fuloong2e
    mips-gcw0 mips-generic mips-gpr mips-ip22 mips-ip27 mips-ip28 mips-ip32
    mips-jazz mips-jmr3927 mips-lemote2f mips-loongson1b mips-loongson1c
    mips-loongson2k mips-loongson3 mips-malta mips-maltaaprp mips-malta_kvm
    mips-malta_qemu_32r6 mips-maltasmvp mips-maltasmvp_eva mips-maltaup
    mips-maltaup_xpa mips-mpc30x mips-mtx1 mips-nlm_xlp mips-nlm_xlr
    mips-omega2p mips-pic32mzda mips-pistachio mips-qi_lb60 mips-rb532
    mips-rbtx49xx mips-rm200 mips-rs90 mips-rt305x mips-sb1250_swarm
    mips-tb0219 mips-tb0226 mips-tb0287 mips-vocore2 mips-workpad mips-xway
    nds32-allmodconfig nds32-allnoconfig nds32-defconfig nios2-10m50
    nios2-3c120 nios2-allmodconfig nios2-allnoconfig openrisc-allmodconfig
    openrisc-allnoconfig openrisc-or1klitex openrisc-or1ksim
    openrisc-simple_smp parisc-allnoconfig parisc-generic-32bit
    parisc-generic-64bit powerpc-acadia powerpc-adder875 powerpc-akebono
    powerpc-amigaone powerpc-arches powerpc-asp8347 powerpc-bamboo
    powerpc-bluestone powerpc-canyonlands powerpc-cell powerpc-chrp32
    powerpc-cm5200 powerpc-currituck powerpc-ebony powerpc-eiger
    powerpc-ep8248e powerpc-ep88xc powerpc-fsp2 powerpc-g5 powerpc-gamecube
    powerpc-ge_imp3a powerpc-holly powerpc-icon powerpc-iss476-smp
    powerpc-katmai powerpc-kilauea powerpc-klondike powerpc-kmeter1
    powerpc-ksi8560 powerpc-linkstation powerpc-lite5200b powerpc-makalu
    powerpc-maple powerpc-mgcoge powerpc-microwatt powerpc-motionpro
    powerpc-mpc512x powerpc-mpc5200 powerpc-mpc7448_hpc2 powerpc-mpc8272_ads
    powerpc-mpc8313_rdb powerpc-mpc8315_rdb powerpc-mpc832x_mds
    powerpc-mpc832x_rdb powerpc-mpc834x_itx powerpc-mpc834x_itxgp
    powerpc-mpc834x_mds powerpc-mpc836x_mds powerpc-mpc836x_rdk
    powerpc-mpc837x_mds powerpc-mpc837x_rdb powerpc-mpc83xx
    powerpc-mpc8540_ads powerpc-mpc8560_ads powerpc-mpc85xx_cds
    powerpc-mpc866_ads powerpc-mpc885_ads powerpc-mvme5100 powerpc-obs600
    powerpc-pasemi powerpc-pcm030 powerpc-pmac32 powerpc-powernv
    powerpc-ppa8548 powerpc-ppc40x powerpc-ppc44x powerpc-ppc64
    powerpc-ppc64e powerpc-ppc6xx powerpc-pq2fads powerpc-ps3
    powerpc-pseries powerpc-rainier powerpc-redwood powerpc-sam440ep
    powerpc-sbc8548 powerpc-sequoia powerpc-skiroot powerpc-socrates
    powerpc-storcenter powerpc-stx_gp3 powerpc-taishan powerpc-tqm5200
    powerpc-tqm8540 powerpc-tqm8541 powerpc-tqm8548 powerpc-tqm8555
    powerpc-tqm8560 powerpc-tqm8xx powerpc-walnut powerpc-warp powerpc-wii
    powerpc-xes_mpc85xx riscv-allmodconfig riscv-allnoconfig riscv-nommu_k210
    riscv-nommu_k210_sdcard riscv-nommu_virt riscv-rv32 s390-allmodconfig
    s390-allnoconfig s390-debug s390-zfcpdump sh-ap325rxa sh-apsh4a3a
    sh-apsh4ad0a sh-dreamcast sh-ecovec24 sh-ecovec24-romimage sh-edosk7705
    sh-edosk7760 sh-espt sh-hp6xx sh-j2 sh-kfr2r09 sh-kfr2r09-romimage
    sh-landisk sh-lboxre2 sh-magicpanelr2 sh-microdev sh-migor sh-polaris
    sh-r7780mp sh-r7785rp sh-rsk7201 sh-rsk7203 sh-rsk7264 sh-rsk7269
    sh-rts7751r2d1 sh-rts7751r2dplus sh-sdk7780 sh-sdk7786 sh-se7206 sh-se7343
    sh-se7619 sh-se7705 sh-se7712 sh-se7721 sh-se7722 sh-se7724 sh-se7750
    sh-se7751 sh-se7780 sh-secureedge5410 sh-sh03 sh-sh2007 sh-sh7710voipgw
    sh-sh7724_generic sh-sh7757lcr sh-sh7763rdp sh-sh7770_generic sh-sh7785lcr
    sh-sh7785lcr_32bit sh-shmin sh-shx3 sh-titan sh-ul2 sh-urquell
    sparc-allmodconfig sparc-allnoconfig sparc-sparc32 sparc-sparc64
    um-i386-allmodconfig um-i386-allnoconfig um-i386-defconfig
    um-x86_64-allmodconfig um-x86_64-allnoconfig x86_64-allmodconfig
    x86_64-allnoconfig x86_64-defconfig xtensa-allmodconfig xtensa-allnoconfig
    xtensa-audio_kc705 xtensa-cadence_csp xtensa-common xtensa-generic_kc705
    xtensa-iss xtensa-nommu_kc705 xtensa-smp_lx200 xtensa-virt
    xtensa-xip_kc705
    
    Tested-by: Nathan Chancellor <nathan@xxxxxxxxxx> # build (hexagon)
    Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
    Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
    Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
    Stable-dep-of: 35f20786c481 ("powerpc: xor_vmx: Add '-mhard-float' to CFLAGS")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/Makefile b/Makefile
index 07a0f520f2df7..53bfef2e8e03f 100644
--- a/Makefile
+++ b/Makefile
@@ -1005,7 +1005,7 @@ KBUILD_CFLAGS += -falign-functions=64
 endif
 
 # arch Makefile may override CC so keep this after arch Makefile is included
-NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
+NOSTDINC_FLAGS += -nostdinc
 
 # warn about C99 declaration after statement
 KBUILD_CFLAGS += -Wdeclaration-after-statement
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index 0941180a86d34..29490be2546bf 100644
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -9,6 +9,8 @@ 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
+# Enable <arm_neon.h>
+CFLAGS_xor-neon.o		+= -isystem $(shell $(CC) -print-file-name=include)
 endif
 
 lib-$(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) += uaccess_flushcache.o
diff --git a/arch/nds32/Makefile b/arch/nds32/Makefile
index ccdca71420201..c17fc3a755c38 100644
--- a/arch/nds32/Makefile
+++ b/arch/nds32/Makefile
@@ -9,6 +9,8 @@ endif
 # Avoid generating FPU instructions
 arch-y  += -mno-ext-fpu-sp -mno-ext-fpu-dp -mfloat-abi=soft
 
+# Enable <nds32_intrinsic.h>
+KBUILD_CFLAGS	+= -isystem $(shell $(CC) -print-file-name=include)
 KBUILD_CFLAGS	+= $(call cc-option, -mno-sched-prolog-epilog)
 KBUILD_CFLAGS	+= -mcmodel=large
 
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 6448de85f7380..9b0f5e6ffa3f2 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -68,5 +68,7 @@ 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)
+# Enable <altivec.h>
+CFLAGS_xor_vmx.o += -isystem $(shell $(CC) -print-file-name=include)
 
 obj-$(CONFIG_PPC64) += $(obj64-y)
diff --git a/crypto/Makefile b/crypto/Makefile
index 429591ffeb5da..fd69bca878e88 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -118,6 +118,8 @@ CFLAGS_aegis128-neon-inner.o += $(aegis128-cflags-y)
 CFLAGS_REMOVE_aegis128-neon-inner.o += -mgeneral-regs-only
 aegis128-$(CONFIG_CRYPTO_AEGIS128_SIMD) += aegis128-neon.o aegis128-neon-inner.o
 endif
+# Enable <arm_neon.h>
+CFLAGS_aegis128-neon-inner.o += -isystem $(shell $(CC) -print-file-name=include)
 
 obj-$(CONFIG_CRYPTO_PCRYPT) += pcrypt.o
 obj-$(CONFIG_CRYPTO_CRYPTD) += cryptd.o
diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile
index c770570bfe4f2..45e17619422b4 100644
--- a/lib/raid6/Makefile
+++ b/lib/raid6/Makefile
@@ -14,6 +14,8 @@ hostprogs	+= mktables
 
 ifeq ($(CONFIG_ALTIVEC),y)
 altivec_flags := -maltivec $(call cc-option,-mabi=altivec)
+# Enable <altivec.h>
+altivec_flags += -isystem $(shell $(CC) -print-file-name=include)
 
 ifdef CONFIG_CC_IS_CLANG
 # clang ppc port does not yet support -maltivec when -msoft-float is
@@ -34,6 +36,8 @@ endif
 # ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel)
 ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
 NEON_FLAGS := -ffreestanding
+# Enable <arm_neon.h>
+NEON_FLAGS += -isystem $(shell $(CC) -print-file-name=include)
 ifeq ($(ARCH),arm)
 NEON_FLAGS += -march=armv7-a -mfloat-abi=softfp -mfpu=neon
 endif




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