linux-kernel - [PATCH 4.4 026/162] math-emu/soft-fp.h: (_FP_ROUND

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Date:   Thu, 19 Dec 2019 19:32:14 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vincent Chen <vincentc@...estech.com>,
        Greentime Hu <greentime@...estech.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 026/162] math-emu/soft-fp.h: (_FP_ROUND_ZERO) cast 0 to void to fix warning

From: Vincent Chen <vincentc@...estech.com>

[ Upstream commit 83312f1b7ae205dca647bf52bbe2d51303cdedfb ]

_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>
Acked-by: Greentime Hu <greentime@...estech.com>
Signed-off-by: Greentime Hu <greentime@...estech.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 include/math-emu/soft-fp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/math-emu/soft-fp.h b/include/math-emu/soft-fp.h
index 3f284bc031809..5650c16283830 100644
--- a/include/math-emu/soft-fp.h
+++ b/include/math-emu/soft-fp.h
@@ -138,7 +138,7 @@ do {							\
       _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 {							\
-- 
2.20.1