linux-kernel - [PATCH 1/1] bug: Add unreachable() to generic BUG() to silence warnings

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Message-Id: <1407374021-20682-1-git-send-email-xerofoiify@gmail.com>
Date:	Thu,  7 Aug 2014 03:13:41 +0200
From:	Nick Krause <xerofoiify@...il.com>
To:	Arnd Bergmann <arnd@...db.de>,
	linux-arch@...r.kernel.org (open list:GENERIC INCLUDE/A...),
	linux-kernel@...r.kernel.org (open list)
Cc:	josh@...htriplett.org
Subject: [PATCH 1/1] bug: Add unreachable() to generic BUG() to silence warnings

Architectures which use generic BUG() have warnings like 

kernel/sched/core.c:2692:1: warning: control reaches end of non-void function [-Wreturn-type]
net/core/ethtool.c:236:1: warning: control reaches end of non-void function [-Wreturn-type]

Other BUG() implementations
have added unreachable() at end but generic does not. I guess
that is why
it showing these errors. We can silence them using unreachable().

Signed-off-by: Nick Krause <xerofoify@...il.com>
---
 include/asm-generic/bug.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 630dd23..effcc82 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -48,6 +48,7 @@ struct bug_entry {
 #define BUG() do { \
 	printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
 	panic("BUG!"); \
+	unreachable(); \
 } while (0)
 #endif
 
-- 
2.0.1

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