linux-kernel - [PATCH v2 09/40] metag/uaccess: fix sparse errors

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Message-ID: <1420558883-10131-10-git-send-email-mst@redhat.com>
Date:	Tue, 6 Jan 2015 17:43:59 +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,
	James Hogan <james.hogan@...tec.com>,
	linux-metag@...r.kernel.org
Subject: [PATCH v2 09/40] metag/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/metag/include/asm/uaccess.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/metag/include/asm/uaccess.h b/arch/metag/include/asm/uaccess.h
index 0748b0a..c314b45 100644
--- a/arch/metag/include/asm/uaccess.h
+++ b/arch/metag/include/asm/uaccess.h
@@ -135,7 +135,7 @@ extern long __get_user_bad(void);
 ({                                                              \
 	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;                                               \
 })
 
@@ -145,7 +145,7 @@ extern long __get_user_bad(void);
 	const __typeof__(*(ptr)) __user *__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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