Linus master branch failed to build the arm64 architecture due to below error and warnings.
kernel config: https://builds.tuxbuild.com/Dp3s1p4uYnGpImQwCvhzEw/kernel.config
git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git target_arch: arm64 toolchain: gcc-9 git_short_log: 83bdc7275e62 (\random32: remove net_rand_state from the latent entropy gcc plugin) git_describe: v5.8-rc7-40-g83bdc7275e62
make -sk KBUILD_BUILD_USER=TuxBuild -C/linux -j16 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- HOSTCC=gcc CC="sccache aarch64-linux-gnu-gcc" O=build Image # In file included from ../arch/arm64/include/asm/smp.h:33, from ../include/linux/smp.h:82, from ../include/linux/percpu.h:7, from ../include/linux/random.h:14, from ../arch/arm64/kernel/pointer_auth.c:5: ../arch/arm64/include/asm/pointer_auth.h: In function ‘ptrauth_keys_init_user’: ../arch/arm64/include/asm/pointer_auth.h:40:3: error: implicit declaration of function ‘get_random_bytes’; did you mean ‘get_random_once’? [-Werror=implicit-function-declaration] 40 | get_random_bytes(&keys->apia, sizeof(keys->apia)); | ^~~~~~~~~~~~~~~~ | get_random_once In file included from ../arch/arm64/kernel/pointer_auth.c:5: ../include/linux/random.h: At top level: ../include/linux/random.h:41:13: warning: conflicting types for ‘get_random_bytes’ 41 | extern void get_random_bytes(void *buf, int nbytes); | ^~~~~~~~~~~~~~~~ In file included from ../arch/arm64/include/asm/smp.h:33, from ../include/linux/smp.h:82, from ../include/linux/percpu.h:7, from ../include/linux/random.h:14, from ../arch/arm64/kernel/pointer_auth.c:5: ../arch/arm64/include/asm/pointer_auth.h:40:3: note: previous implicit declaration of ‘get_random_bytes’ was here 40 | get_random_bytes(&keys->apia, sizeof(keys->apia)); | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors
build log link, https://gitlab.com/Linaro/lkft/kernel-runs/-/jobs/662908458