From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/mm/pgtable-generic.c | 18 ++++++++++++++----
1 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/kernel/mm/pgtable-generic.c b/kernel/mm/pgtable-generic.c
index 36770fc..4e640ba 100644
--- a/kernel/mm/pgtable-generic.c
+++ b/kernel/mm/pgtable-generic.c
@@ -2,14 +2,15 @@
/*
* mm/pgtable-generic.c
*
- * Generic pgtable methods declared in asm-generic/pgtable.h
+ * Generic pgtable methods declared in linux/pgtable.h
*
* Copyright (C) 2010 Linus Torvalds
*/
#include <linux/pagemap.h>
+#include <linux/hugetlb.h>
+#include <linux/pgtable.h>
#include <asm/tlb.h>
-#include <asm-generic/pgtable.h>
/*
* If a p?d_bad entry is found while walking page tables, report
@@ -23,18 +24,27 @@
pgd_clear(pgd);
}
+#ifndef __PAGETABLE_P4D_FOLDED
void p4d_clear_bad(p4d_t *p4d)
{
p4d_ERROR(*p4d);
p4d_clear(p4d);
}
+#endif
+#ifndef __PAGETABLE_PUD_FOLDED
void pud_clear_bad(pud_t *pud)
{
pud_ERROR(*pud);
pud_clear(pud);
}
+#endif
+/*
+ * Note that the pmd variant below can't be stub'ed out just as for p4d/pud
+ * above. pmd folding is special and typically pmd_* macros refer to upper
+ * level even when folded
+ */
void pmd_clear_bad(pmd_t *pmd)
{
pmd_ERROR(*pmd);
@@ -43,7 +53,7 @@
#ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
/*
- * Only sets the access flags (dirty, accessed), as well as write
+ * Only sets the access flags (dirty, accessed), as well as write
* permission. Furthermore, we know it always gets set to a "more
* permissive" setting, which allows most architectures to optimize
* this. We return whether the PTE actually changed, which in turn
@@ -184,7 +194,7 @@
pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
{
- pmd_t old = pmdp_establish(vma, address, pmdp, pmd_mknotpresent(*pmdp));
+ pmd_t old = pmdp_establish(vma, address, pmdp, pmd_mkinvalid(*pmdp));
flush_pmd_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
return old;
}
--
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