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mm: pgtable: introduce generic pagetable_dtor_free()

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The pte_free(), pmd_free(), __pud_free() and __p4d_free() in
asm-generic/pgalloc.h and the generic __tlb_remove_table() are basically
the same, so let's introduce pagetable_dtor_free() to deduplicate them.

In addition, the pagetable_dtor_free() in s390 does the same thing, so
let's s390 also calls generic pagetable_dtor_free().

Link: https://lkml.kernel.org/r/1663a0565aca881d1338ceb7d1db4aa9c333abd6.1736317725.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>	[s390]
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Alexandre Ghiti <alexghiti@rivosinc.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jann Horn <jannh@google.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qi Zheng 2025-01-08 14:57:33 +08:00 committed by Andrew Morton
parent e74e173101
commit 553e77529f
4 changed files with 11 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/s390/mm/pgalloc.c
View File

@ -180,12 +180,6 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
return table;
}
static void pagetable_dtor_free(struct ptdesc *ptdesc)
{
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
}
void page_table_free(struct mm_struct *mm, unsigned long *table)
{
struct ptdesc *ptdesc = virt_to_ptdesc(table);

12
include/asm-generic/pgalloc.h
View File

@ -109,8 +109,7 @@ static inline void pte_free(struct mm_struct *mm, struct page *pte_page)
{
struct ptdesc *ptdesc = page_ptdesc(pte_page);
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
pagetable_dtor_free(ptdesc);
}
@ -153,8 +152,7 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
struct ptdesc *ptdesc = virt_to_ptdesc(pmd);
BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
pagetable_dtor_free(ptdesc);
}
#endif
@ -202,8 +200,7 @@ static inline void __pud_free(struct mm_struct *mm, pud_t *pud)
struct ptdesc *ptdesc = virt_to_ptdesc(pud);
BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
pagetable_dtor_free(ptdesc);
}
#ifndef __HAVE_ARCH_PUD_FREE
@ -248,8 +245,7 @@ static inline void __p4d_free(struct mm_struct *mm, p4d_t *p4d)
struct ptdesc *ptdesc = virt_to_ptdesc(p4d);
BUG_ON((unsigned long)p4d & (PAGE_SIZE-1));
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
pagetable_dtor_free(ptdesc);
}
#ifndef __HAVE_ARCH_P4D_FREE

3
include/asm-generic/tlb.h
View File

@ -213,8 +213,7 @@ static inline void __tlb_remove_table(void *table)
{
struct ptdesc *ptdesc = (struct ptdesc *)table;
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
pagetable_dtor_free(ptdesc);
}
#endif

6
include/linux/mm.h
View File

@ -3001,6 +3001,12 @@ static inline void pagetable_dtor(struct ptdesc *ptdesc)
lruvec_stat_sub_folio(folio, NR_PAGETABLE);
}
static inline void pagetable_dtor_free(struct ptdesc *ptdesc)
{
pagetable_dtor(ptdesc);
pagetable_free(ptdesc);
}
static inline bool pagetable_pte_ctor(struct ptdesc *ptdesc)
{
struct folio *folio = ptdesc_folio(ptdesc);