| From 321cb0308a9e76841394b4bbab6a1107cfedbae0 Mon Sep 17 00:00:00 2001 |
| From: Xiongfeng Wang <xiongfeng.wang@linaro.org> |
| Date: Thu, 11 Jan 2018 17:22:29 +0800 |
| Subject: Kbuild: suppress packed-not-aligned warning for default setting only |
| |
| From: Xiongfeng Wang <xiongfeng.wang@linaro.org> |
| |
| commit 321cb0308a9e76841394b4bbab6a1107cfedbae0 upstream. |
| |
| gcc-8 reports many -Wpacked-not-aligned warnings. The below are some |
| examples. |
| |
| ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct |
| ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] |
| } __attribute__ ((packed)); |
| |
| ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct |
| ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] |
| } __attribute__ ((packed)); |
| |
| ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct |
| ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] |
| } __attribute__ ((packed)); |
| |
| This patch suppresses this kind of warnings for default setting. |
| |
| Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org> |
| Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| scripts/Makefile.extrawarn | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/scripts/Makefile.extrawarn |
| +++ b/scripts/Makefile.extrawarn |
| @@ -10,6 +10,8 @@ |
| # are not supported by all versions of the compiler |
| # ========================================================================== |
| |
| +KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) |
| + |
| ifeq ("$(origin W)", "command line") |
| export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) |
| endif |
| @@ -25,6 +27,7 @@ warning-1 += -Wold-style-definition |
| warning-1 += $(call cc-option, -Wmissing-include-dirs) |
| warning-1 += $(call cc-option, -Wunused-but-set-variable) |
| warning-1 += $(call cc-option, -Wunused-const-variable) |
| +warning-1 += $(call cc-option, -Wpacked-not-aligned) |
| warning-1 += $(call cc-disable-warning, missing-field-initializers) |
| |
| warning-2 := -Waggregate-return |
