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From: Stafford Horne <shorne@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: openrisc@lists.librecores.org, Stafford Horne <shorne@gmail.com>,
	Jonas Bonn <jonas@southpole.se>,
	Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>
Subject: [PATCH 1/3] openrisc: xchg: fix `computed is not used` warning
Date: Tue, 14 Mar 2017 23:56:26 +0900	[thread overview]
Message-ID: <44f79fa18a167e2fb175c93cab20c775814dd1b7.1489502779.git.shorne@gmail.com> (raw)
In-Reply-To: <cover.1489502779.git.shorne@gmail.com>
In-Reply-To: <cover.1489502779.git.shorne@gmail.com>

When building allmodconfig this warning shows.

  fs/ocfs2/file.c: In function 'ocfs2_file_write_iter':
  ./arch/openrisc/include/asm/cmpxchg.h:81:3: warning: value computed is
  not used [-Wunused-value]
    ((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr))))
     ^

Applying the same patch logic that was done to the cmpxchg macro.

Signed-off-by: Stafford Horne <shorne@gmail.com>
---
 arch/openrisc/include/asm/cmpxchg.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/openrisc/include/asm/cmpxchg.h b/arch/openrisc/include/asm/cmpxchg.h
index 5fcb9ac..f0a5d8b 100644
--- a/arch/openrisc/include/asm/cmpxchg.h
+++ b/arch/openrisc/include/asm/cmpxchg.h
@@ -77,7 +77,11 @@ static inline unsigned long __xchg(unsigned long val, volatile void *ptr,
 	return val;
 }
 
-#define xchg(ptr, with) \
-	((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr))))
+#define xchg(ptr, with) 						\
+	({								\
+		(__typeof__(*(ptr))) __xchg((unsigned long)(with),	\
+					    (ptr),			\
+					    sizeof(*(ptr)));		\
+	})
 
 #endif /* __ASM_OPENRISC_CMPXCHG_H */
-- 
2.9.3

  reply	other threads:[~2017-03-14 15:00 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-14 14:56 [PATCH 0/3] Openrisc fixes for 4.11 Stafford Horne
2017-03-14 14:56 ` Stafford Horne [this message]
2017-03-14 14:56 ` [PATCH 2/3] openrisc: fix issue handling 8 byte get_user calls Stafford Horne
2017-03-14 14:56 ` [PATCH 3/3] openrisc: Export symbols needed by modules Stafford Horne
2017-03-14 15:25   ` [OpenRISC] " Geert Uytterhoeven
2017-03-14 22:17     ` Stafford Horne

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