From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/arch/x86/mm/init_32.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/kernel/arch/x86/mm/init_32.c b/kernel/arch/x86/mm/init_32.c
index da31c26..7c05525 100644
--- a/kernel/arch/x86/mm/init_32.c
+++ b/kernel/arch/x86/mm/init_32.c
@@ -394,6 +394,19 @@
return last_map_addr;
}
+pte_t *kmap_pte;
+
+static void __init kmap_init(void)
+{
+ unsigned long kmap_vstart;
+
+ /*
+ * Cache the first kmap pte:
+ */
+ kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
+ kmap_pte = virt_to_kpte(kmap_vstart);
+}
+
#ifdef CONFIG_HIGHMEM
static void __init permanent_kmaps_init(pgd_t *pgd_base)
{
@@ -699,6 +712,8 @@
__flush_tlb_all();
+ kmap_init();
+
/*
* NOTE: at this point the bootmem allocator is fully available.
*/
--
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