linux-kernel - [PATCH v2 02/40] alpha/uaccess: fix sparse errors

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Message-ID: <1420558883-10131-3-git-send-email-mst@redhat.com>
Date:	Tue, 6 Jan 2015 17:43:34 +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,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>, linux-alpha@...r.kernel.org
Subject: [PATCH v2 02/40] alpha/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/alpha/include/asm/uaccess.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h
index 766fdfd..a234de7 100644
--- a/arch/alpha/include/asm/uaccess.h
+++ b/arch/alpha/include/asm/uaccess.h
@@ -96,7 +96,7 @@ extern void __get_user_unknown(void);
 	  case 8: __get_user_64(ptr); break;			\
 	  default: __get_user_unknown(); break;			\
 	}							\
-	(x) = (__typeof__(*(ptr))) __gu_val;			\
+	(x) = (__force __typeof__(*(ptr))) __gu_val;		\
 	__gu_err;						\
 })
 
@@ -115,7 +115,7 @@ extern void __get_user_unknown(void);
 		  default: __get_user_unknown(); break;			\
 		}							\
 	}								\
-	(x) = (__typeof__(*(ptr))) __gu_val;				\
+	(x) = (__force __typeof__(*(ptr))) __gu_val;			\
 	__gu_err;							\
 })
 
-- 
MST

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