linux-kernel - [PATCH 07/18] ia64/uaccess: fix sparse errors

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Date:	Sun, 14 Dec 2014 18:52:27 +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,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>, linux-ia64@...r.kernel.org
Subject: [PATCH 07/18] ia64/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/ia64/include/asm/uaccess.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/include/asm/uaccess.h b/arch/ia64/include/asm/uaccess.h
index 449c8c0..d818ae4 100644
--- a/arch/ia64/include/asm/uaccess.h
+++ b/arch/ia64/include/asm/uaccess.h
@@ -197,7 +197,7 @@ extern void __get_user_unknown (void);
 		      case 8: __get_user_size(__gu_val, __gu_ptr, 8, __gu_err); break;	\
 		      default: __get_user_unknown(); break;				\
 		}									\
-	(x) = (__typeof__(*(__gu_ptr))) __gu_val;					\
+	(x) = (__force __typeof__(*(__gu_ptr))) __gu_val;					\
 	__gu_err;									\
 })
 
-- 
MST

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