valid_user_sp     249 arch/powerpc/perf/callchain.c 		if (!valid_user_sp(sp, 1) || read_user_stack_64(fp, &next_sp))
valid_user_sp     455 arch/powerpc/perf/callchain.c 		if (!valid_user_sp(sp, 0) || read_user_stack_32(fp, &next_sp))