linux-kernel - [PATCH v3 5/5] math-emu/soft-fp.h: (_FP_ROUND

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Message-ID: <6dc27690fc09371754b1f350b682197562bbd8ec.1541055990.git.vincentc@andestech.com>
Date:   Thu, 1 Nov 2018 15:17:01 +0800
From:   Vincent Chen <vincentc@...estech.com>
To:     <arnd@...db.de>, <linux-kernel@...r.kernel.org>
CC:     <green.hu@...il.com>, <deanbo422@...il.com>,
        <vincentc@...estech.com>
Subject: [PATCH v3 5/5] math-emu/soft-fp.h: (_FP_ROUND_ZERO) cast 0 to void to fix warning

_FP_ROUND_ZERO is defined as 0 and used as a statemente in macro
_FP_ROUND. This generates "error: statement with no effect
[-Werror=unused-value]" from gcc. Defining _FP_ROUND_ZERO as (void)0 to
fix it.

This modification is quoted from glibc 'commit <In libc/:>
(8ed1e7d5894000c155acbd06f)'

Signed-off-by: Vincent Chen <vincentc@...estech.com>
---
 include/math-emu/soft-fp.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/math-emu/soft-fp.h b/include/math-emu/soft-fp.h
index 3f284bc..5650c16 100644
--- a/include/math-emu/soft-fp.h
+++ b/include/math-emu/soft-fp.h
@@ -138,7 +138,7 @@
       _FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND);		\
 } while (0)
 
-#define _FP_ROUND_ZERO(wc, X)		0
+#define _FP_ROUND_ZERO(wc, X)		(void)0
 
 #define _FP_ROUND_PINF(wc, X)				\
 do {							\
-- 
1.7.1