blackfin: fix put_user sparse errors

virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.

For example:

	__le32 __user *p;
	__le32 x;
	put_user(x, p);

is safe, but currently triggers a sparse warning.

Fix that up using __force.

Note: this does not suppress any useful sparse checks since caller
assigns x to typeof(*p), which in turn forces all the necessary type
checks.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h
index 2dcc9303355d..4bf968c01cf9 100644
--- a/arch/blackfin/include/asm/uaccess.h
+++ b/arch/blackfin/include/asm/uaccess.h
@@ -89,10 +89,10 @@ struct exception_table_entry {
                         break;                                  \
                 case 8: {                                       \
                         long _xl, _xh;                          \
-                        _xl = ((long *)&_x)[0];                 \
-                        _xh = ((long *)&_x)[1];                 \
-                        __put_user_asm(_xl, ((long __user *)_p)+0, );   \
-                        __put_user_asm(_xh, ((long __user *)_p)+1, );   \
+                        _xl = ((__force long *)&_x)[0];         \
+                        _xh = ((__force long *)&_x)[1];         \
+                        __put_user_asm(_xl, ((__force long __user *)_p)+0, );\
+                        __put_user_asm(_xh, ((__force long __user *)_p)+1, );\
                 } break;                                        \
                 default:                                        \
                         _err = __put_user_bad();                \