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xen: fix truncation of machine address 

arbitrary_virt_to_machine can truncate a machine address if its above
4G.  Cast the problem away.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Jeremy Fitzhardinge 2008-07-08 15:06:54 -07:00 committed by Ingo Molnar
parent 39dbc5bd34
commit ebd879e397
1 changed files with 1 additions and 1 deletions
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arch/x86/xen/mmu.c
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@ -186,7 +186,7 @@ xmaddr_t arbitrary_virt_to_machine(unsigned long address)
BUG_ON(pte == NULL);
return XMADDR((pte_mfn(*pte) << PAGE_SHIFT) + offset);
return XMADDR(((phys_addr_t)pte_mfn(*pte) << PAGE_SHIFT) + offset);
}
void make_lowmem_page_readonly(void *vaddr)