Tile currently does not trigger sparse warnings when get_user
causes an illegal assignment across bitwise types.
For example:
__le32 __user *p;
__u32 x;
put_user(x, p);
violates endian-ness rules, but currently does not trigger sparse
warning on tile.
Fix this by adding some dead code.
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
arch/tile/include/asm/uaccess.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
index 22cffa1..03d905c 100644
--- a/arch/tile/include/asm/uaccess.h
+++ b/arch/tile/include/asm/uaccess.h
@@ -218,6 +218,8 @@ extern int __get_user_bad(void)
case 8: __get_user_8(x, ptr, __ret); break; \
default: __ret = __get_user_bad(); break; \
} \
+ if (0) \
+ x = *(__force typeof(*ptr) *)(ptr); \
__ret; \
})
@@ -297,6 +299,8 @@ extern int __put_user_bad(void)
case 8: __put_user_8(x, ptr, __ret); break; \
default: __ret = __put_user_bad(); break; \
} \
+ if (0) \
+ *(__force typeof(*ptr) *)(ptr) = x; \
__ret; \
})
--
MST
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