linux-kernel - [PATCH 01/17] kbuild: Disable -Waddress-of-packed-member for gcc 9

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Message-Id: <20190321220009.29334-2-andi@firstfloor.org>
Date:   Thu, 21 Mar 2019 14:59:53 -0700
From:   Andi Kleen <andi@...stfloor.org>
To:     x86@...nel.org
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>, arnd@...db.de,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH 01/17] kbuild: Disable -Waddress-of-packed-member for gcc 9

From: Andi Kleen <ak@...ux.intel.com>

This warning is very noisy in a default build with gcc 9.
Move it into W=2 only.

Cc: arnd@...db.de
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 Makefile                   | 1 +
 scripts/Makefile.extrawarn | 1 +
 2 files changed, 2 insertions(+)

diff --git a/Makefile b/Makefile
index 71c2c482e2a2..78efbb172991 100644
--- a/Makefile
+++ b/Makefile
@@ -676,6 +676,7 @@ KBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, int-in-bool-context)
+KBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
 
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS	+= $(call cc-option,-Oz,-Os)
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 768306add591..ed974a0f4a47 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -43,6 +43,7 @@ warning-2 += $(call cc-option, -Wmissing-field-initializers)
 warning-2 += $(call cc-option, -Wsign-compare)
 warning-2 += $(call cc-option, -Wmaybe-uninitialized)
 warning-2 += $(call cc-option, -Wunused-macros)
+warning-2 += $(call cc-option, -Waddress-of-packed-member)
 
 warning-3 := -Wbad-function-cast
 warning-3 += -Wcast-qual
-- 
2.20.1