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From:   Paul Walmsley <paul.walmsley@sifive.com>
To:     linux-riscv@lists.infradead.org
Cc:     linux-kernel@vger.kernel.org
Subject: [PATCH 4/8] riscv: ensure RISC-V C model definitions are passed to static analyzers
Date:   Thu, 17 Oct 2019 17:49:25 -0700
Message-Id: <20191018004929.3445-5-paul.walmsley@sifive.com>
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Static analysis tools such as sparse don't set the RISC-V C model
preprocessor directives such as "__riscv_cmodel_medany", set by the C
compilers.  This causes the static analyzers to evaluate different
preprocessor paths than C compilers would.  Fix this by defining the
appropriate C model macros in the static analyzer command lines.

Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
---
 arch/riscv/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index f5e914210245..0247a90bd4d8 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -47,9 +47,11 @@ KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
 
 ifeq ($(CONFIG_CMODEL_MEDLOW),y)
 	KBUILD_CFLAGS += -mcmodel=medlow
+	CHECKFLAGS += -D__riscv_cmodel_medlow
 endif
 ifeq ($(CONFIG_CMODEL_MEDANY),y)
 	KBUILD_CFLAGS += -mcmodel=medany
+	CHECKFLAGS += -D__riscv_cmodel_medany
 endif
 ifeq ($(CONFIG_MODULE_SECTIONS),y)
 	KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds
-- 
2.23.0