[merged mm-stable] x86-pgtable-convert-__tlb_remove_table-to-use-struct-ptdesc.patch removed from -mm tree

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The quilt patch titled
     Subject: x86: pgtable: convert __tlb_remove_table() to use struct ptdesc
has been removed from the -mm tree.  Its filename was
     x86-pgtable-convert-__tlb_remove_table-to-use-struct-ptdesc.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Subject: x86: pgtable: convert __tlb_remove_table() to use struct ptdesc
Date: Wed, 8 Jan 2025 14:57:27 +0800

Convert __tlb_remove_table() to use struct ptdesc, which will help to move
pagetable_dtor() to __tlb_remove_table().

And page tables shouldn't have swap cache, so use pagetable_free() instead
of free_page_and_swap_cache() to free page table pages.

Link: https://lkml.kernel.org/r/39f60f93143ff77cf5d6b3c3e75af0ffc1480adb.1736317725.git.zhengqi.arch@xxxxxxxxxxxxx
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Reviewed-by: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Alexandre Ghiti <alex@xxxxxxxx>
Cc: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: Aneesh Kumar K.V (Arm) <aneesh.kumar@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Yu Zhao <yuzhao@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 arch/x86/include/asm/tlb.h |   16 +++++++++-------
 arch/x86/kernel/paravirt.c |    4 +++-
 arch/x86/mm/pgtable.c      |   12 +++++++-----
 3 files changed, 19 insertions(+), 13 deletions(-)

--- a/arch/x86/include/asm/tlb.h~x86-pgtable-convert-__tlb_remove_table-to-use-struct-ptdesc
+++ a/arch/x86/include/asm/tlb.h
@@ -31,24 +31,26 @@ static inline void tlb_flush(struct mmu_
  */
 static inline void __tlb_remove_table(void *table)
 {
-	free_page_and_swap_cache(table);
+	struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+	pagetable_free(ptdesc);
 }
 
 #ifdef CONFIG_PT_RECLAIM
 static inline void __tlb_remove_table_one_rcu(struct rcu_head *head)
 {
-	struct page *page;
+	struct ptdesc *ptdesc;
 
-	page = container_of(head, struct page, rcu_head);
-	put_page(page);
+	ptdesc = container_of(head, struct ptdesc, pt_rcu_head);
+	__tlb_remove_table(ptdesc);
 }
 
 static inline void __tlb_remove_table_one(void *table)
 {
-	struct page *page;
+	struct ptdesc *ptdesc;
 
-	page = table;
-	call_rcu(&page->rcu_head, __tlb_remove_table_one_rcu);
+	ptdesc = table;
+	call_rcu(&ptdesc->pt_rcu_head, __tlb_remove_table_one_rcu);
 }
 #define __tlb_remove_table_one __tlb_remove_table_one
 #endif /* CONFIG_PT_RECLAIM */
--- a/arch/x86/kernel/paravirt.c~x86-pgtable-convert-__tlb_remove_table-to-use-struct-ptdesc
+++ a/arch/x86/kernel/paravirt.c
@@ -62,7 +62,9 @@ void __init native_pv_lock_init(void)
 #ifndef CONFIG_PT_RECLAIM
 static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)
 {
-	tlb_remove_page(tlb, table);
+	struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+	tlb_remove_page(tlb, ptdesc_page(ptdesc));
 }
 #else
 static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)
--- a/arch/x86/mm/pgtable.c~x86-pgtable-convert-__tlb_remove_table-to-use-struct-ptdesc
+++ a/arch/x86/mm/pgtable.c
@@ -23,7 +23,9 @@ EXPORT_SYMBOL(physical_mask);
 static inline
 void paravirt_tlb_remove_table(struct mmu_gather *tlb, void *table)
 {
-	tlb_remove_page(tlb, table);
+	struct ptdesc *ptdesc = (struct ptdesc *)table;
+
+	tlb_remove_page(tlb, ptdesc_page(ptdesc));
 }
 #else
 static inline
@@ -62,7 +64,7 @@ void ___pte_free_tlb(struct mmu_gather *
 {
 	pagetable_dtor(page_ptdesc(pte));
 	paravirt_release_pte(page_to_pfn(pte));
-	paravirt_tlb_remove_table(tlb, pte);
+	paravirt_tlb_remove_table(tlb, page_ptdesc(pte));
 }
 
 #if CONFIG_PGTABLE_LEVELS > 2
@@ -78,7 +80,7 @@ void ___pmd_free_tlb(struct mmu_gather *
 	tlb->need_flush_all = 1;
 #endif
 	pagetable_dtor(ptdesc);
-	paravirt_tlb_remove_table(tlb, ptdesc_page(ptdesc));
+	paravirt_tlb_remove_table(tlb, ptdesc);
 }
 
 #if CONFIG_PGTABLE_LEVELS > 3
@@ -88,7 +90,7 @@ void ___pud_free_tlb(struct mmu_gather *
 
 	pagetable_dtor(ptdesc);
 	paravirt_release_pud(__pa(pud) >> PAGE_SHIFT);
-	paravirt_tlb_remove_table(tlb, virt_to_page(pud));
+	paravirt_tlb_remove_table(tlb, ptdesc);
 }
 
 #if CONFIG_PGTABLE_LEVELS > 4
@@ -98,7 +100,7 @@ void ___p4d_free_tlb(struct mmu_gather *
 
 	pagetable_dtor(ptdesc);
 	paravirt_release_p4d(__pa(p4d) >> PAGE_SHIFT);
-	paravirt_tlb_remove_table(tlb, virt_to_page(p4d));
+	paravirt_tlb_remove_table(tlb, ptdesc);
 }
 #endif	/* CONFIG_PGTABLE_LEVELS > 4 */
 #endif	/* CONFIG_PGTABLE_LEVELS > 3 */
_

Patches currently in -mm which might be from zhengqi.arch@xxxxxxxxxxxxx are






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