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sparc64: mm: call ctor/dtor for kernel PTEs

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The generic implementation of pte_{alloc_one,free}_kernel now calls the
[cd]tor, without initialising the ptlock needlessly as
pagetable_pte_ctor() skips it for init_mm.

Align sparc64 with the generic implementation by ensuring
pagetable_pte_[cd]tor() are called for kernel PTEs.  As a result the
kernel and user alloc/free functions have the same implementation, and
since pgtable_t is defined as pte_t *, we can have both call a common
helper.

Link: https://lkml.kernel.org/r/20250408095222.860601-7-kevin.brodsky@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linus Waleij <linus.walleij@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: <x86@kernel.org>
Cc: Yang Shi <yang@os.amperecomputing.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kevin Brodsky 2025-04-08 10:52:16 +01:00 committed by Andrew Morton
parent 8e8299bf38
commit 10a2e444e4
1 changed files with 13 additions and 14 deletions
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27
arch/sparc/mm/init_64.c
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@ -2878,18 +2878,7 @@ void __flush_tlb_all(void)
: : "r" (pstate));
}
pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
pte_t *pte = NULL;
if (page)
pte = (pte_t *) page_address(page);
return pte;
}
pgtable_t pte_alloc_one(struct mm_struct *mm)
static pte_t *__pte_alloc_one(struct mm_struct *mm)
{
struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL | __GFP_ZERO, 0);
@ -2902,9 +2891,14 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
return ptdesc_address(ptdesc);
}
void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
free_page((unsigned long)pte);
return __pte_alloc_one(mm);
}
pgtable_t pte_alloc_one(struct mm_struct *mm)
{
return __pte_alloc_one(mm);
}
static void __pte_free(pgtable_t pte)
@ -2915,6 +2909,11 @@ static void __pte_free(pgtable_t pte)
pagetable_free(ptdesc);
}
void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
__pte_free(pte);
}
void pte_free(struct mm_struct *mm, pgtable_t pte)
{
__pte_free(pte);