[PATCH 3/7] x86, LLVM: suppress clang warnings about unaligned accesses

From	Michael Davidson <md@google.com>
Newsgroups	linux.kernel
Subject	[PATCH 3/7] x86, LLVM: suppress clang warnings about unaligned accesses
Date	2017-03-17 01:30 +0100
Message-ID	<tlNWh-6eK-7@gated-at.bofh.it> (permalink)
References	<tlNWh-6eK-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Suppress clang warnings about potential unaliged accesses
to members in packed structs. This gets rid of almost 10,000
warnings about accesses to the ring 0 stack pointer in the TSS.

Signed-off-by: Michael Davidson <md@google.com>
---
 arch/x86/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 894a8d18bf97..7f21703c475d 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -128,6 +128,11 @@ endif
         KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args)
 endif
 
+ifeq ($(cc-name),clang)
+# Suppress clang warnings about potential unaligned accesses.
+KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
+endif
+
 ifdef CONFIG_X86_X32
 	x32_ld_ok := $(call try-run,\
 			/bin/echo -e '1: .quad 1b' | \
-- 
2.12.0.367.g23dc2f6d3c-goog

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[PATCH 3/7] x86, LLVM: suppress clang warnings about unaligned accesses Michael Davidson <md@google.com> - 2017-03-17 01:30 +0100
  Re: [PATCH 3/7] x86, LLVM: suppress clang warnings about unaligned accesses hpa@zytor.com - 2017-03-18 01:00 +0100

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