Compiling with W=1 with werror enabled produces an error: drivers/firmware/efi/cper-arm.c: In function ‘cper_print_proc_arm’: drivers/firmware/efi/cper-arm.c:298:64: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=] 298 | snprintf(infopfx, sizeof(infopfx), "%s ", newpfx); | ^ drivers/firmware/efi/cper-arm.c:298:25: note: ‘snprintf’ output between 2 and 65 bytes into a destination of size 64 298 | snprintf(infopfx, sizeof(infopfx), "%s ", newpfx); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ As the logic there adds an space at the end of infopx buffer. Add an extra space to avoid such warning. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> --- drivers/firmware/efi/cper-arm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/efi/cper-arm.c b/drivers/firmware/efi/cper-arm.c index fa9c1c3bf168..d9bbcea0adf4 100644 --- a/drivers/firmware/efi/cper-arm.c +++ b/drivers/firmware/efi/cper-arm.c @@ -240,7 +240,7 @@ void cper_print_proc_arm(const char *pfx, int i, len, max_ctx_type; struct cper_arm_err_info *err_info; struct cper_arm_ctx_info *ctx_info; - char newpfx[64], infopfx[64]; + char newpfx[64], infopfx[65]; printk("%sMIDR: 0x%016llx\n", pfx, proc->midr); -- 2.45.2