linux-kernel - [PATCH 4.4 34/36] libceph: use BUG() instead of BUG

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Message-Id: <20170313083354.705959720@linuxfoundation.org>
Date:   Mon, 13 Mar 2017 16:39:34 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Ilya Dryomov <idryomov@...il.com>,
        Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 4.4 34/36] libceph: use BUG() instead of BUG_ON(1)

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnd Bergmann <arnd@...db.de>

commit d24cdcd3e40a6825135498e11c20c7976b9bf545 upstream.

I ran into this compile warning, which is the result of BUG_ON(1)
not always leading to the compiler treating the code path as
unreachable:

    include/linux/ceph/osdmap.h: In function 'ceph_can_shift_osds':
    include/linux/ceph/osdmap.h:62:1: error: control reaches end of non-void function [-Werror=return-type]

Using BUG() here avoids the warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Ilya Dryomov <idryomov@...il.com>
Cc: Heinrich Schuchardt <xypron.glpk@....de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/linux/ceph/osdmap.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/ceph/osdmap.h
+++ b/include/linux/ceph/osdmap.h
@@ -49,7 +49,7 @@ static inline bool ceph_can_shift_osds(s
 	case CEPH_POOL_TYPE_EC:
 		return false;
 	default:
-		BUG_ON(1);
+		BUG();
 	}
 }