xen/x86: there's no highmem anymore in PV mode

Considerations for it are a leftover from when 32-bit was still
supported.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/ba6e0779-18f4-ae64-b216-73205b4eec3c@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 8bfc103..c1eba7e 100644 (file)
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -306,10 +306,6 @@ static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
                BUG();
        }
 
-       /* Update kernel mapping, but not for highmem. */
-       if (pfn >= PFN_UP(__pa(high_memory - 1)))
-               return;
-
        if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
                                         mfn_pte(mfn, PAGE_KERNEL), 0)) {
                WARN(1, "Failed to update kernel mapping for mfn=%ld pfn=%ld\n",