linux-kernel - [PATCH 08/13] arm/arm64: xen: avoid gcc-4.4 warning

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Date:   Fri, 16 Dec 2016 11:56:29 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     linux-arch@...r.kernel.org
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kernel-build-reports@...ts.linaro.org,
        kvmarm@...ts.cs.columbia.edu, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 08/13] arm/arm64: xen: avoid gcc-4.4 warning

Ancient gcc doesn't know about __builtin_unreachable(), causing
lots of instances of a harmless warning:

include/xen/arm/page.h: In function 'arbitrary_virt_to_machine':
include/xen/arm/page.h:85: warning: no return statement in function returning non-void

Adding a return statement doesn't change the behavior here, but
shuts up that warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/xen/arm/page.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/xen/arm/page.h b/include/xen/arm/page.h
index 415dbc6e43fd..2485013e3c6f 100644
--- a/include/xen/arm/page.h
+++ b/include/xen/arm/page.h
@@ -82,6 +82,7 @@ static inline unsigned long bfn_to_pfn(unsigned long bfn)
 static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
 {
 	BUG();
+	return XMADDR(0);
 }
 
 /* TODO: this shouldn't be here but it is because the frontend drivers
-- 
2.9.0