diff mbox series

[007/156] mm/debug_vm_pgtable/THP: mark the pte entry huge before using set_pmd/pud_at

Message ID 20201016024121.hxwVjFK14%akpm@linux-foundation.org
State New
Headers show
Series [001/156] device-dax/kmem: fix resource release | expand

Commit Message

Andrew Morton Oct. 16, 2020, 2:41 a.m. UTC
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: mm/debug_vm_pgtable/THP: mark the pte entry huge before using set_pmd/pud_at

kernel expects entries to be marked huge before we use
set_pmd_at()/set_pud_at().

Link: https://lkml.kernel.org/r/20200902114222.181353-7-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/debug_vm_pgtable.c |   20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)
diff mbox series

Patch

--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-thp-mark-the-pte-entry-huge-before-using-set_pmd-pud_at
+++ a/mm/debug_vm_pgtable.c
@@ -155,7 +155,7 @@  static void __init pmd_advanced_tests(st
 				      unsigned long pfn, unsigned long vaddr,
 				      pgprot_t prot)
 {
-	pmd_t pmd = pfn_pmd(pfn, prot);
+	pmd_t pmd;
 
 	if (!has_transparent_hugepage())
 		return;
@@ -164,19 +164,19 @@  static void __init pmd_advanced_tests(st
 	/* Align the address wrt HPAGE_PMD_SIZE */
 	vaddr = (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE;
 
-	pmd = pfn_pmd(pfn, prot);
+	pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
 	set_pmd_at(mm, vaddr, pmdp, pmd);
 	pmdp_set_wrprotect(mm, vaddr, pmdp);
 	pmd = READ_ONCE(*pmdp);
 	WARN_ON(pmd_write(pmd));
 
-	pmd = pfn_pmd(pfn, prot);
+	pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
 	set_pmd_at(mm, vaddr, pmdp, pmd);
 	pmdp_huge_get_and_clear(mm, vaddr, pmdp);
 	pmd = READ_ONCE(*pmdp);
 	WARN_ON(!pmd_none(pmd));
 
-	pmd = pfn_pmd(pfn, prot);
+	pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
 	pmd = pmd_wrprotect(pmd);
 	pmd = pmd_mkclean(pmd);
 	set_pmd_at(mm, vaddr, pmdp, pmd);
@@ -236,7 +236,7 @@  static void __init pmd_huge_tests(pmd_t
 
 static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
 {
-	pmd_t pmd = pfn_pmd(pfn, prot);
+	pmd_t pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
 
 	if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
 		return;
@@ -276,7 +276,7 @@  static void __init pud_advanced_tests(st
 				      unsigned long pfn, unsigned long vaddr,
 				      pgprot_t prot)
 {
-	pud_t pud = pfn_pud(pfn, prot);
+	pud_t pud;
 
 	if (!has_transparent_hugepage())
 		return;
@@ -285,25 +285,27 @@  static void __init pud_advanced_tests(st
 	/* Align the address wrt HPAGE_PUD_SIZE */
 	vaddr = (vaddr & HPAGE_PUD_MASK) + HPAGE_PUD_SIZE;
 
+	pud = pud_mkhuge(pfn_pud(pfn, prot));
 	set_pud_at(mm, vaddr, pudp, pud);
 	pudp_set_wrprotect(mm, vaddr, pudp);
 	pud = READ_ONCE(*pudp);
 	WARN_ON(pud_write(pud));
 
 #ifndef __PAGETABLE_PMD_FOLDED
-	pud = pfn_pud(pfn, prot);
+	pud = pud_mkhuge(pfn_pud(pfn, prot));
 	set_pud_at(mm, vaddr, pudp, pud);
 	pudp_huge_get_and_clear(mm, vaddr, pudp);
 	pud = READ_ONCE(*pudp);
 	WARN_ON(!pud_none(pud));
 
-	pud = pfn_pud(pfn, prot);
+	pud = pud_mkhuge(pfn_pud(pfn, prot));
 	set_pud_at(mm, vaddr, pudp, pud);
 	pudp_huge_get_and_clear_full(mm, vaddr, pudp, 1);
 	pud = READ_ONCE(*pudp);
 	WARN_ON(!pud_none(pud));
 #endif /* __PAGETABLE_PMD_FOLDED */
-	pud = pfn_pud(pfn, prot);
+
+	pud = pud_mkhuge(pfn_pud(pfn, prot));
 	pud = pud_wrprotect(pud);
 	pud = pud_mkclean(pud);
 	set_pud_at(mm, vaddr, pudp, pud);