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xen/p2m: m2p_find_override: use list_for_each_entry_safe

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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>
This commit is contained in:
Stefano Stabellini
2012-03-27 14:52:44 +01:00
committed by Konrad Rzeszutek Wilk
parent e8e937be97
commit b960d6c43a
1 changed files with 2 additions and 6 deletions
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8
arch/x86/xen/p2m.c
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@ -809,21 +809,17 @@ struct page *m2p_find_override(unsigned long mfn)
{ {
unsigned long flags; unsigned long flags;
struct list_head *bucket = &m2p_overrides[mfn_hash(mfn)]; struct list_head *bucket = &m2p_overrides[mfn_hash(mfn)];
struct page *p, *ret; struct page *p, *t, *ret;
ret = NULL; ret = NULL;
spin_lock_irqsave(&m2p_override_lock, flags); list_for_each_entry_safe(p, t, bucket, lru) {
list_for_each_entry(p, bucket, lru) {
if (page_private(p) == mfn) { if (page_private(p) == mfn) {
ret = p; ret = p;
break; break;
} }
} }
spin_unlock_irqrestore(&m2p_override_lock, flags);
return ret; return ret;
} }