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[AUTOSEL,for,4.9,104/293] arm64: pass machine size to sparse

Message ID 20180409002239.163177-104-alexander.levin@microsoft.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sasha Levin April 9, 2018, 12:24 a.m. UTC 
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

[ Upstream commit f5d284900c0f960e318a063f4c40826b6e3aa6a8 ]

When using sparse on the arm64 tree we get many thousands of
warnings like 'constant ... is so big it is unsigned long long'
or 'shift too big (32) for type unsigned long'. This happens
because by default sparse considers the machine as 32bit and
defines the size of the types accordingly.

Fix this by passing the '-m64' flag to sparse so that
sparse can correctly define longs as being 64bit.

CC: Catalin Marinas <catalin.marinas@arm.com>
CC: Will Deacon <will.deacon@arm.com>
CC: linux-arm-kernel@lists.infradead.org
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 arch/arm64/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 92110c2c6c59..bc66f4b6a1cb 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -58,7 +58,7 @@  LD		+= -EL
 UTS_MACHINE	:= aarch64
 endif
 
-CHECKFLAGS	+= -D__aarch64__
+CHECKFLAGS	+= -D__aarch64__ -m64
 
 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
 KBUILD_CFLAGS_MODULE	+= -mcmodel=large