The patch titled
Subject: x86/mm: define mm_p4d_folded()
has been added to the -mm tree. Its filename is
x86-mm-define-mm_p4d_folded.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/x86-mm-define-mm_p4d_folded.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/x86-mm-define-mm_p4d_folded.patch
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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: x86/mm: define mm_p4d_folded()
This just defines mm_p4d_folded() to check whether P4D page table level is
folded at runtime.
Link: http://lkml.kernel.org/r/1587436495-22033-2-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/pgtable_64.h | 6 ++++++
1 file changed, 6 insertions(+)
--- a/arch/x86/include/asm/pgtable_64.h~x86-mm-define-mm_p4d_folded
+++ a/arch/x86/include/asm/pgtable_64.h
@@ -53,6 +53,12 @@ static inline void sync_initial_page_tab
struct mm_struct;
+#define mm_p4d_folded mm_p4d_folded
+static inline bool mm_p4d_folded(struct mm_struct *mm)
+{
+ return !pgtable_l5_enabled();
+}
+
void set_pte_vaddr_p4d(p4d_t *p4d_page, unsigned long vaddr, pte_t new_pte);
void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte);
_
Patches currently in -mm which might be from anshuman.khandual@xxxxxxx are
powerpc-mm-drop-platform-defined-pmd_mknotpresent.patch
mm-thp-rename-pmd_mknotpresent-as-pmd_mknotvalid.patch
x86-mm-define-mm_p4d_folded.patch
mm-debug-add-tests-validating-architecture-page-table-helpers.patch
mm-debug-add-tests-validating-architecture-page-table-helpers-v17.patch
