linux-kernel - [PATCH 7/8] next: sh: Fix compile error

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Message-Id: <1421312314-72330-8-git-send-email-borntraeger@de.ibm.com>
Date:	Thu, 15 Jan 2015 09:58:33 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-arch@...r.kernel.org, kvm@...r.kernel.org,
	kvm-ppc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	x86@...nel.org, xen-devel@...ts.xenproject.org, linux-mm@...ck.org,
	Guenter Roeck <linux@...ck-us.net>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>
Subject: [PATCH 7/8] next: sh: Fix compile error

From: Guenter Roeck <linux@...ck-us.net>

Commit a91ed664749c ("kernel: tighten rules for ACCESS ONCE") results in a
compile failure for sh builds with CONFIG_X2TLB enabled.

arch/sh/mm/gup.c: In function 'gup_get_pte':
arch/sh/mm/gup.c:20:2: error: invalid initializer
make[1]: *** [arch/sh/mm/gup.o] Error 1

Replace ACCESS_ONCE with READ_ONCE to fix the problem.

Fixes: a91ed664749c ("kernel: tighten rules for ACCESS ONCE")
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Christian Borntraeger <borntraeger@...ibm.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Reviewed-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
---
 arch/sh/mm/gup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sh/mm/gup.c b/arch/sh/mm/gup.c
index 37458f3..e113bb4 100644
--- a/arch/sh/mm/gup.c
+++ b/arch/sh/mm/gup.c
@@ -17,7 +17,7 @@
 static inline pte_t gup_get_pte(pte_t *ptep)
 {
 #ifndef CONFIG_X2TLB
-	return ACCESS_ONCE(*ptep);
+	return READ_ONCE(*ptep);
 #else
 	/*
 	 * With get_user_pages_fast, we walk down the pagetables without
-- 
1.9.3

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