Hi Al, Kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal.git execve2 head: 1ade99215ed3c334a544b9e1773602ff0f0251ab commit: 1ade99215ed3c334a544b9e1773602ff0f0251ab [9/9] x86: switch to generic sys_execve and kernel_execve config: um-defconfig (attached as .config) All related error/warning messages: fs/exec.c: In function 'kernel_execve': fs/exec.c:2358:2: error: implicit declaration of function 'ret_from_kernel_execve' [-Werror=implicit-function-declaration] fs/exec.c:2359:1: warning: control reaches end of non-void function [-Wreturn-type] cc1: some warnings being treated as errors vim +2358 fs/exec.c 2355 * We were successful. We won't be returning to our caller, but 2356 * instead to user space by manipulating the kernel stack. 2357 */ > 2358 ret_from_kernel_execve(current_pt_regs(), ®s); 2359 } 2360 #endif --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation