sh: arc: cmpxchg.h:50:12: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]

The arc and sh defconfig builds failed due to following build warnings / errors on the Linux next-20240415 with gcc-9 and gcc-11. Reported-by: Linux Kernel Functional Testing Following builds failed. sh: arc: - defconfig - tinyconfig - allnoconfig - vdk_hs38_smp_defconfig Build log: ---

next: arc: defconfig - gcc-9 - mmu-arcv2.h:82:2: error: implicit declaration of function 'write_aux_reg' [-Werror=implicit-function-declaration]

The following arc defconfig build warnings / errors noticed on today's Linux next-20240326 tag. Regressions: * arc - defconfig - gcc-9 build failed. Reported-by: Linux Kernel Functional Testing Build log: - arch/arc/kernel/ptrace.c:342:16: warning: no previous prototype for 'syscall

arc-elf32-ld: net/xfrm/xfrm_algo.o:(.rodata+0x24): undefined reference to `crypto_has_aead'

The arc defconfig builds failed on Linux next from Sept 22. Reported-by: Linux Kernel Functional Testing Build log: --- arc-elf32-ld: net/xfrm/xfrm_algo.o:(.rodata+0x24): undefined reference to `crypto_has_aead' arc-elf32-ld: net/xfrm/xfrm_algo.o:(.rodata+0x24): undefined reference to `c

arc: kernel/entry.S:310: Error: inappropriate arguments for opcode 'and'

310: Error: inappropriate arguments for opcode 'and' make[3]: *** [../scripts/Makefile.build:364: arch/arc/kernel/entry-arcv2.o] Error 1 Reported-by: Naresh Kamboju -- Linaro LKFT https://lkft.linaro.org ___ linux-snps-arc mailing

ARC: allmodconfig: Error: inappropriate arguments for opcode 'mpyd'

arc:allmodconfig build failed with gcc-8, gcc-9 and gcc-10 on Linus's mainline tree. Build log: make -sk KBUILD_BUILD_USER=TuxBuild -C/linux ARCH=arc CROSS_COMPILE=arc-elf32- HOSTCC=gcc CC="sccache arc-elf32-gcc" O=build allmodconfig make -sk KBUILD_BUILD_USER=TuxBuild -C/linux -j16