diff options
| -rw-r--r-- | arch/x86/xen/p2m.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index 215a3ce..2a44edd 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -671,7 +671,9 @@ int m2p_add_override(unsigned long mfn, struct page *page) page->private = mfn; page->index = pfn_to_mfn(pfn); - __set_phys_to_machine(pfn, FOREIGN_FRAME(mfn)); + if (unlikely(!set_phys_to_machine(pfn, FOREIGN_FRAME(mfn)))) + return -ENOMEM; + if (!PageHighMem(page)) /* Just zap old mapping for now */ pte_clear(&init_mm, address, ptep); @@ -709,7 +711,7 @@ int m2p_remove_override(struct page *page) spin_lock_irqsave(&m2p_override_lock, flags); list_del(&page->lru); spin_unlock_irqrestore(&m2p_override_lock, flags); - __set_phys_to_machine(pfn, page->index); + set_phys_to_machine(pfn, page->index); if (!PageHighMem(page)) set_pte_at(&init_mm, address, ptep, |