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x86/uaccess: fix sparse errors

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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>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Michael S. Tsirkin 2014-12-12 01:56:04 +02:00
parent 99975cc6ad
commit e182c570e9
1 changed files with 1 additions and 1 deletions
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arch/x86/include/asm/uaccess.h
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@ -179,7 +179,7 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
asm volatile("call __get_user_%P3" \ asm volatile("call __get_user_%P3" \
: "=a" (__ret_gu), "=r" (__val_gu) \ : "=a" (__ret_gu), "=r" (__val_gu) \
: "0" (ptr), "i" (sizeof(*(ptr)))); \ : "0" (ptr), "i" (sizeof(*(ptr)))); \
(x) = (__typeof__(*(ptr))) __val_gu; \ (x) = (__force __typeof__(*(ptr))) __val_gu; \
__ret_gu; \ __ret_gu; \
}) })