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[Xen-devel,v3,11/15] xen/x86: p2m-pod: Clean-up p2m_pod_zero_check

Message ID 20171002125941.11274-12-julien.grall@arm.com
State Accepted
Commit 5529c9c2a8d78b98d33f239ef6ea7e6ff2045b33
Headers show
Series xen/x86: Clean-up the PoD code | expand

Commit Message

Julien Grall Oct. 2, 2017, 12:59 p.m. UTC 
Signed-off-by: Julien Grall <julien.grall@arm.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

---

Cc: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>

    Changes in v3:
        - Replace (foo == 0) by !foo
        - Remove uneeded parentheses

    Changes in v2:
        - Add Andrew's acked-by
---
 xen/arch/x86/mm/p2m-pod.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Comments

George Dunlap Oct. 2, 2017, 4:13 p.m. UTC | #1 
On 10/02/2017 01:59 PM, Julien Grall wrote:
> Signed-off-by: Julien Grall <julien.grall@arm.com>
> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

Reviewed-by: George Dunlap <george.dunlap@citrix.com>
diff mbox series

Patch

diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c
index 176d06cb42..6581f8d82f 100644
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -861,17 +861,19 @@  p2m_pod_zero_check(struct p2m_domain *p2m, unsigned long *gfns, int count)
     for ( i = 0; i < count; i++ )
     {
         p2m_access_t a;
+        struct page_info *pg;
 
         mfns[i] = p2m->get_entry(p2m, _gfn(gfns[i]), types + i, &a,
                                  0, NULL, NULL);
+        pg = mfn_to_page(mfns[i]);
+
         /*
          * If this is ram, and not a pagetable or from the xen heap, and
          * probably not mapped elsewhere, map it; otherwise, skip.
          */
-        if ( p2m_is_ram(types[i])
-             && ( (mfn_to_page(mfns[i])->count_info & PGC_allocated) != 0 )
-             && ( (mfn_to_page(mfns[i])->count_info & (PGC_page_table|PGC_xen_heap)) == 0 )
-             && ( (mfn_to_page(mfns[i])->count_info & PGC_count_mask) <= max_ref ) )
+        if ( p2m_is_ram(types[i]) && (pg->count_info & PGC_allocated) &&
+             !(pg->count_info & (PGC_page_table | PGC_xen_heap)) &&
+             ((pg->count_info & PGC_count_mask) <= max_ref) )
             map[i] = map_domain_page(mfns[i]);
         else
             map[i] = NULL;