linux-kernel - [PATCH] arm/xen: Remove definiition of virt_to

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Message-Id: <1397836474-10478-1-git-send-email-julien.grall@linaro.org>
Date:	Fri, 18 Apr 2014 16:54:34 +0100
From:	Julien Grall <julien.grall@...aro.org>
To:	stefano.stabellini@...citrix.com
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xenproject.org, ian.campbell@...rix.com,
	david.vrabel@...rix.com, konrad.wilk@...cle.com,
	Julien Grall <julien.grall@...aro.org>
Subject: [PATCH] arm/xen: Remove definiition of virt_to_pfn in asm/xen/page.h

virt_to_pfn has been defined in asm/memory.h by the commit e26a9e0 "ARM: Better
virt_to_page() handling"

This will result of a compilation warning when CONFIG_XEN is enabled.

arch/arm/include/asm/xen/page.h:80:0: warning: "virt_to_pfn" redefined [enabled by default]
 #define virt_to_pfn(v)          (PFN_DOWN(__pa(v)))
 ^
In file included from arch/arm/include/asm/page.h:163:0,
                 from arch/arm/include/asm/xen/page.h:4,
                 from include/xen/page.h:4,
                 from arch/arm/xen/grant-table.c:33:

The definition in memory.h is nearly the same (it directly expand PFN_DOWN),
so we can safely drop virt_to_pfn in xen include.

Signed-off-by: Julien Grall <julien.grall@...aro.org>
---
 arch/arm/include/asm/xen/page.h |    1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index cf4f3e8..ded062f 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -77,7 +77,6 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
 }
 /* VIRT <-> MACHINE conversion */
 #define virt_to_machine(v)	(phys_to_machine(XPADDR(__pa(v))))
-#define virt_to_pfn(v)          (PFN_DOWN(__pa(v)))
 #define virt_to_mfn(v)		(pfn_to_mfn(virt_to_pfn(v)))
 #define mfn_to_virt(m)		(__va(mfn_to_pfn(m) << PAGE_SHIFT))
 
-- 
1.7.10.4

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