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[PATCH 5/6] xen/x86: there's no highmem anymore in PV mode
- To: Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 30 Sep 2021 14:36:56 +0200
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 30 Sep 2021 12:37:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Considerations for it are a leftover from when 32-bit was still
supported.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -306,10 +306,6 @@ static void __init xen_update_mem_tables
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",
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