sh: 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>
diff --git a/arch/sh/include/asm/uaccess_64.h b/arch/sh/include/asm/uaccess_64.h
index 2e07e0f..c01376c 100644
--- a/arch/sh/include/asm/uaccess_64.h
+++ b/arch/sh/include/asm/uaccess_64.h
@@ -59,19 +59,19 @@
switch (size) { \
case 1: \
retval = __put_user_asm_b((void *)&x, \
- (long)ptr); \
+ (__force long)ptr); \
break; \
case 2: \
retval = __put_user_asm_w((void *)&x, \
- (long)ptr); \
+ (__force long)ptr); \
break; \
case 4: \
retval = __put_user_asm_l((void *)&x, \
- (long)ptr); \
+ (__force long)ptr); \
break; \
case 8: \
retval = __put_user_asm_q((void *)&x, \
- (long)ptr); \
+ (__force long)ptr); \
break; \
default: \
__put_user_unknown(); \