From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 13/18] powerpc/uaccess: fix sparse errors
Date: Sun, 14 Dec 2014 18:52:51 +0200 [thread overview]
Message-ID: <1418575877-21488-14-git-send-email-mst@redhat.com> (raw)
In-Reply-To: <1418575877-21488-1-git-send-email-mst@redhat.com>
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@redhat.com>
---
arch/powerpc/include/asm/uaccess.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 9485b43..a0c071d 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -284,7 +284,7 @@ do { \
if (!is_kernel_addr((unsigned long)__gu_addr)) \
might_fault(); \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
- (x) = (__typeof__(*(ptr)))__gu_val; \
+ (x) = (__force __typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
#endif /* __powerpc64__ */
@@ -297,7 +297,7 @@ do { \
might_fault(); \
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; \
})
@@ -308,7 +308,7 @@ do { \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
__chk_user_ptr(ptr); \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
- (x) = (__typeof__(*(ptr)))__gu_val; \
+ (x) = (__force __typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
--
MST
next parent reply other threads:[~2014-12-14 16:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1418575877-21488-1-git-send-email-mst@redhat.com>
2014-12-14 16:52 ` Michael S. Tsirkin [this message]
2014-12-15 0:05 ` [PATCH 13/18] powerpc/uaccess: fix sparse errors Benjamin Herrenschmidt
2014-12-15 1:37 ` Benjamin Herrenschmidt
2014-12-16 16:47 ` Michael S. Tsirkin
2014-12-16 23:50 ` Michael Ellerman
2014-12-17 0:52 ` Benjamin Herrenschmidt
2014-12-17 10:53 ` Arnd Bergmann
2014-12-17 11:05 ` Benjamin Herrenschmidt
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