Commit fe846979 authored by Hillf Danton's avatar Hillf Danton Committed by Stefano Stabellini
Browse files

xen/arm: Use p2m entry with lock protection 



A new local variable is introduced for accessing p2m entry with lock
protection.

Signed-off-by: default avatarHillf Danton <hdanton@sina.com>
Signed-off-by: default avatarStefano Stabellini <sstabellini@kernel.org>
Reviewed-by: default avatarStefano Stabellini <sstabellini@kernel.org>
parent 425f1cc2

arch/arm/xen/p2m.c

+2 −1
Original line number Diff line number Diff line
@@ -70,8 +70,9 @@ unsigned long __pfn_to_mfn(unsigned long pfn) 
		entry = rb_entry(n, struct xen_p2m_entry, rbnode_phys);

		if (entry->pfn <= pfn &&

				entry->pfn + entry->nr_pages > pfn) {

			unsigned long mfn = entry->mfn + (pfn - entry->pfn);

			read_unlock_irqrestore(&p2m_lock, irqflags);

			return entry->mfn + (pfn - entry->pfn);

			return mfn;

		}

		if (pfn < entry->pfn)

			n = n->rb_left;

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