xen/p2m: m2p_find_override: use list_for_each_entry_safe

Use list_for_each_entry_safe and remove the spin_lock acquisition in
m2p_find_override.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 1b267e75158d..7ed8cc3434c5 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -809,21 +809,17 @@ struct page *m2p_find_override(unsigned long mfn)
 {
         unsigned long flags;
         struct list_head *bucket = &m2p_overrides[mfn_hash(mfn)];
-        struct page *p, *ret;
+        struct page *p, *t, *ret;
 
         ret = NULL;
 
-        spin_lock_irqsave(&m2p_override_lock, flags);
-
-        list_for_each_entry(p, bucket, lru) {
+        list_for_each_entry_safe(p, t, bucket, lru) {
                 if (page_private(p) == mfn) {
                         ret = p;
                         break;
                 }
         }
 
-        spin_unlock_irqrestore(&m2p_override_lock, flags);
-
         return ret;
 }