linux-kernel - [PATCH 17/18] xtensa/uaccess: fix sparse errors

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Message-ID: <1418575877-21488-18-git-send-email-mst@redhat.com>
Date:	Sun, 14 Dec 2014 18:53:10 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	Chris Zankel <chris@...kel.net>,
	Max Filippov <jcmvbkbc@...il.com>,
	linux-xtensa@...ux-xtensa.org
Subject: [PATCH 17/18] xtensa/uaccess: fix sparse errors

virtio wants to read bitwise types from userspace using get_user.  At the
moment this triggers sparse errors, since the value is passed through an
integer.

Fix that up using __force.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 arch/xtensa/include/asm/uaccess.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index c7211e7..876eb38 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -320,7 +320,7 @@ __asm__ __volatile__(					\
 ({								\
 	long __gu_err, __gu_val;				\
 	__get_user_size(__gu_val,(ptr),(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;			\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;						\
 })
 
@@ -330,7 +330,7 @@ __asm__ __volatile__(					\
 	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
 	if (access_ok(VERIFY_READ,__gu_addr,size))			\
 		__get_user_size(__gu_val,__gu_addr,(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;				\
 	__gu_err;							\
 })
 
-- 
MST

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