From: Meelis Roos <mroos@xxxxxxxx> Date: Tue, 22 Aug 2017 22:25:12 +0300 (EEST) > Just noticed this scroll away when compiling todays 4.13-rc5+git on a > sparc64 machine with old debian gcc version 4.9.2 (Debian 4.9.2-1). > > CC arch/sparc/kernel/nmi.o > In file included from ./include/linux/compiler.h:58:0, > from ./include/uapi/linux/stddef.h:1, > from ./include/linux/stddef.h:4, > from ./include/uapi/linux/posix_types.h:4, > from ./include/uapi/linux/types.h:13, > from ./include/linux/types.h:5, > from ./include/linux/proc_fs.h:7, > from kernel/cpu.c:6: > kernel/cpu.c: In function 'cpu_up': > ./arch/sparc/include/asm/percpu_64.h:13:13: warning: array subscript is above array bounds [-Warray-bounds] > (trap_block[(__cpu)].__per_cpu_base) trap_block[] is an array of size NR_CPUS. We are feeding a variable 'cpu' into this array index. I can't see how the compiler can say whether the array subscript is above the array bounds or not. It lacks sufficient information to determine this for sure. I would just ignore this for now. Your subject line should have been "kernel/cpu.c: ..." instead of "arch/sparc/kernel/nmi.c" btw. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
