[Xen-changelog] [xen-unstable] x86/mm: Revert changeset 24582:f6c33cfe7333

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
# Date 1328890027 0
# Node ID c6adf6ef3afb22fb1fd265d76300e6e5a84e1d5f
# Parent  e0ddac877f420e51314a97fc9f9f7befb44dc5a1
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@xxxxxxxxxxxxxxxx>
Acked-by: Tim Deegan <tjd-xen@xxxxxxxxxxxxxx>
Committed-by: Tim Deegan <tim@xxxxxxx>
---


diff -r e0ddac877f42 -r c6adf6ef3afb xen/arch/x86/mm/p2m.c
--- a/xen/arch/x86/mm/p2m.c     Fri Feb 10 16:07:07 2012 +0000
+++ b/xen/arch/x86/mm/p2m.c     Fri Feb 10 16:07:07 2012 +0000
@@ -361,6 +361,8 @@
     if (p2m == NULL)
         return;
 
+    p2m_lock(p2m);
+
 #ifdef __x86_64__
     for ( gfn=0; gfn < p2m->max_mapped_pfn; gfn++ )
     {
@@ -374,8 +376,6 @@
     }
 #endif
 
-    p2m_lock(p2m);
-
     p2m->phys_table = pagetable_null();
 
     while ( (pg = page_list_remove_head(&p2m->pages)) )

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