[Xen-devel] [PATCH RFC v2 7/9] xen/arm: Missing impl of clear_guest_offset macro

[Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>]

This macro is somehow accidently broken. Fill up the rest of it.

Signed-off-by: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
---
 xen/include/asm-arm/guest_access.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/include/asm-arm/guest_access.h 
b/xen/include/asm-arm/guest_access.h
index 34aae14..1104090 100644
--- a/xen/include/asm-arm/guest_access.h
+++ b/xen/include/asm-arm/guest_access.h
@@ -77,8 +77,10 @@ unsigned long raw_clear_guest(void *to, unsigned len);
  * Clear an array of objects in guest context via a guest handle,
  * specifying an offset into the guest array.
  */
-#define clear_guest_offset(hnd, off, ptr, nr) ({      \
-    raw_clear_guest(_d+(off), nr);  \
+#define clear_guest_offset(hnd, off, ptr, nr) ({        \
+    const typeof(*(ptr)) *_s = (ptr);                   \
+    char (*_d)[sizeof(*_s)] = (void *)(hnd).p;          \
+    raw_clear_guest(_d+(off), nr);                      \
 })
 
 /*
-- 
1.8.1.2


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel