xen: use correct type for physical addresses

When converting a pfn to a physical address be sure to use 64 bit
wide types or convert the physical address to a pfn if possible.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index feb6d86fa0a0..410210f279bf 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -140,7 +140,7 @@ static void __init xen_del_extra_mem(u64 start, u64 size)
 unsigned long __ref xen_chk_extra_mem(unsigned long pfn)
 {
         int i;
-        unsigned long addr = PFN_PHYS(pfn);
+        phys_addr_t addr = PFN_PHYS(pfn);
 
         for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
                 if (addr >= xen_extra_mem[i].start &&
@@ -284,7 +284,7 @@ static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
         }
 
         /* Update kernel mapping, but not for highmem. */
-        if ((pfn << PAGE_SHIFT) >= __pa(high_memory))
+        if (pfn >= PFN_UP(__pa(high_memory - 1)))
                 return;
 
         if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),