The quilt patch titled
Subject: parisc: mm: ensure pagetable_pmd_[cd]tor are called
has been removed from the -mm tree. Its filename was
parisc-mm-ensure-pagetable_pmd_tor-are-called.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: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Subject: parisc: mm: ensure pagetable_pmd_[cd]tor are called
Date: Fri, 3 Jan 2025 18:44:11 +0000
The implementation of pmd_{alloc_one,free} on parisc requires a non-zero
allocation order, but is completely standard aside from that. Let's reuse
the generic implementation of pmd_alloc_one(). Explicit zeroing is not
needed as GFP_PGTABLE_KERNEL includes __GFP_ZERO. The generic pmd_free()
can handle higher allocation orders so we don't need to define our own.
These changes ensure that pagetable_pmd_[cd]tor are called, improving the
accounting of page table pages.
Link: https://lkml.kernel.org/r/20250103184415.2744423-3-kevin.brodsky@xxxxxxx
Signed-off-by: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Acked-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/parisc/include/asm/pgalloc.h | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
--- a/arch/parisc/include/asm/pgalloc.h~parisc-mm-ensure-pagetable_pmd_tor-are-called
+++ a/arch/parisc/include/asm/pgalloc.h
@@ -11,7 +11,6 @@
#include <asm/cache.h>
#define __HAVE_ARCH_PMD_ALLOC_ONE
-#define __HAVE_ARCH_PMD_FREE
#define __HAVE_ARCH_PGD_FREE
#include <asm-generic/pgalloc.h>
@@ -46,17 +45,19 @@ static inline void pud_populate(struct m
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
- pmd_t *pmd;
+ struct ptdesc *ptdesc;
+ gfp_t gfp = GFP_PGTABLE_USER;
- pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_TABLE_ORDER);
- if (likely(pmd))
- memset ((void *)pmd, 0, PAGE_SIZE << PMD_TABLE_ORDER);
- return pmd;
-}
-
-static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
-{
- free_pages((unsigned long)pmd, PMD_TABLE_ORDER);
+ if (mm == &init_mm)
+ gfp = GFP_PGTABLE_KERNEL;
+ ptdesc = pagetable_alloc(gfp, PMD_TABLE_ORDER);
+ if (!ptdesc)
+ return NULL;
+ if (!pagetable_pmd_ctor(ptdesc)) {
+ pagetable_free(ptdesc);
+ return NULL;
+ }
+ return ptdesc_address(ptdesc);
}
#endif
_
Patches currently in -mm which might be from kevin.brodsky@xxxxxxx are
