Hi Jan,

On 02/03/18 15:54, Jan Beulich wrote:
On 21.02.18 at 15:02, <julien.gr...@arm.com> wrote:
@@ -872,7 +879,7 @@ map_grant_ref(
      struct grant_table *lgt, *rgt;
      struct vcpu   *led;
      grant_handle_t handle;
-    unsigned long  frame = 0;
+    mfn_t frame = _mfn(0);


If the initializer is needed at all, I think it should again become
INVALID_MFN. Same in a few other places.

I didn't switch to INVALID_MFN because I wasn't sure if some place in the code where relying on 0. If you think it is fine, then I am more thank happy to switch to INVALID_MFN.


--- a/xen/include/asm-x86/grant_table.h
+++ b/xen/include/asm-x86/grant_table.h
@@ -76,7 +76,7 @@ static inline unsigned int gnttab_dom0_max(void)
  #define gnttab_status_gmfn(d, t, i)                     \
      (mfn_to_gmfn(d, gnttab_status_mfn(t, i)))
-#define gnttab_mark_dirty(d, f) paging_mark_dirty((d), _mfn(f))
+#define gnttab_mark_dirty(d, f) paging_mark_dirty((d), f)

Please take the opportunity and also drop the stray parentheses
around d.

Sure.


With these taken care of and with Wei's R-b
Acked-by: Jan Beulich <jbeul...@suse.com>

Cheers,

--
Julien Grall

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