x86/mm: make p2m lock into an rwlock

Because the p2m lock was already recursive, we need to add a new
mm-lock class of recursive rwlocks.

Signed-off-by: Tim Deegan <tim@xen.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index fa98b43ff7..15cdd8253a 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -192,7 +192,7 @@ typedef unsigned int p2m_query_t;
 /* Per-p2m-table state */
 struct p2m_domain {
     /* Lock that protects updates to the p2m */
-    mm_lock_t          lock;
+    mm_rwlock_t           lock;
 
     /* Shadow translated domain: p2m mapping */
     pagetable_t        phys_table;