X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fxen%2Fmmu.c;h=a3872f7632e880fb0a7e6312f5781e1df6ae1423;hb=61cca2fab7ecba18f9b9680cd736ef5fa82ad3b1;hp=f987bde77c490666fa27e728b509ce9d8d0ab1b6;hpb=95b6886526bb510b8370b625a49bc0ab3b8ff10f;p=pandora-kernel.git

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index f987bde77c49..a3872f7632e8 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1713,15 +1713,17 @@ static void __init xen_map_identity_early(pmd_t *pmd, unsigned long max_pfn)
 void __init xen_setup_machphys_mapping(void)
 {
 	struct xen_machphys_mapping mapping;
-	unsigned long machine_to_phys_nr_ents;
 
 	if (HYPERVISOR_memory_op(XENMEM_machphys_mapping, &mapping) == 0) {
 		machine_to_phys_mapping = (unsigned long *)mapping.v_start;
-		machine_to_phys_nr_ents = mapping.max_mfn + 1;
+		machine_to_phys_nr = mapping.max_mfn + 1;
 	} else {
-		machine_to_phys_nr_ents = MACH2PHYS_NR_ENTRIES;
+		machine_to_phys_nr = MACH2PHYS_NR_ENTRIES;
 	}
-	machine_to_phys_order = fls(machine_to_phys_nr_ents - 1);
+#ifdef CONFIG_X86_32
+	WARN_ON((machine_to_phys_mapping + (machine_to_phys_nr - 1))
+		< machine_to_phys_mapping);
+#endif
 }
 
 #ifdef CONFIG_X86_64