x86/mm: Revert changeset 24582:f6c33cfe7333

With synchronized p2m lookups this is no longer needed, and we can lock the p2m
up-front.

Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Acked-by: Tim Deegan <tjd-xen@phlegethon.org>
Committed-by: Tim Deegan <tim@xen.org>

diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index 8bbcce04e55df830b38fca8002d6f4a45eb1dad2..645c7f90f672f592945d4b543bd138c083dc79ad 100644 (file)
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -361,6 +361,8 @@ void p2m_teardown(struct p2m_domain *p2m)
     if (p2m == NULL)
         return;
 
+    p2m_lock(p2m);
+
 #ifdef __x86_64__
     for ( gfn=0; gfn < p2m->max_mapped_pfn; gfn++ )
     {
@@ -374,8 +376,6 @@ void p2m_teardown(struct p2m_domain *p2m)
     }
 #endif
 
-    p2m_lock(p2m);
-
     p2m->phys_table = pagetable_null();
 
     while ( (pg = page_list_remove_head(&p2m->pages)) )