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Message-ID: <34f40e4f-c962-d141-b991-5252045be6b1@arm.com>
Date: Thu, 29 Jul 2021 10:32:29 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Gavin Shan <gshan@...hat.com>, linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org, gerald.schaefer@...ux.ibm.com,
aneesh.kumar@...ux.ibm.com, christophe.leroy@...roup.eu,
cai@....pw, catalin.marinas@....com, will@...nel.org,
akpm@...ux-foundation.org, chuhu@...hat.com, shan.gavin@...il.com
Subject: Re: [PATCH v4 04/12] mm/debug_vm_pgtable: Use struct
pgtable_debug_args in protnone and devmap tests
On 7/27/21 11:43 AM, Gavin Shan wrote:
> This uses struct pgtable_debug_args in protnone and devmap test
> functions. After that, the unused variable @protnone in debug_vm_pgtable()
> is dropped.
>
> Signed-off-by: Gavin Shan <gshan@...hat.com>
> ---
> mm/debug_vm_pgtable.c | 58 +++++++++++++++++++------------------------
> 1 file changed, 26 insertions(+), 32 deletions(-)
>
> diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
> index 0fa98083f7d5..650e35656660 100644
> --- a/mm/debug_vm_pgtable.c
> +++ b/mm/debug_vm_pgtable.c
> @@ -662,9 +662,9 @@ static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
> WARN_ON(pmd_bad(pmd));
> }
>
> -static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pte_special_tests(struct pgtable_debug_args *args)
> {
> - pte_t pte = pfn_pte(pfn, prot);
> + pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
>
> if (!IS_ENABLED(CONFIG_ARCH_HAS_PTE_SPECIAL))
> return;
> @@ -673,9 +673,9 @@ static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
> WARN_ON(!pte_special(pte_mkspecial(pte)));
> }
>
> -static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pte_protnone_tests(struct pgtable_debug_args *args)
> {
> - pte_t pte = pfn_pte(pfn, prot);
> + pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot_none);
>
> if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
> return;
> @@ -686,7 +686,7 @@ static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
> }
>
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> -static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pmd_protnone_tests(struct pgtable_debug_args *args)
> {
> pmd_t pmd;
>
> @@ -697,25 +697,25 @@ static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
> return;
>
> pr_debug("Validating PMD protnone\n");
> - pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
> + pmd = pmd_mkhuge(pfn_pmd(args->fixed_pmd_pfn, args->page_prot_none));
> WARN_ON(!pmd_protnone(pmd));
> WARN_ON(!pmd_present(pmd));
> }
> #else /* !CONFIG_TRANSPARENT_HUGEPAGE */
> -static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot) { }
> +static void __init pmd_protnone_tests(struct pgtable_debug_args *args) { }
> #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
>
> #ifdef CONFIG_ARCH_HAS_PTE_DEVMAP
> -static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pte_devmap_tests(struct pgtable_debug_args *args)
> {
> - pte_t pte = pfn_pte(pfn, prot);
> + pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
>
> pr_debug("Validating PTE devmap\n");
> WARN_ON(!pte_devmap(pte_mkdevmap(pte)));
> }
>
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> -static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pmd_devmap_tests(struct pgtable_debug_args *args)
> {
> pmd_t pmd;
>
> @@ -723,12 +723,12 @@ static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
> return;
>
> pr_debug("Validating PMD devmap\n");
> - pmd = pfn_pmd(pfn, prot);
> + pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
> WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd)));
> }
>
> #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
> -static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pud_devmap_tests(struct pgtable_debug_args *args)
> {
> pud_t pud;
>
> @@ -736,20 +736,20 @@ static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
> return;
>
> pr_debug("Validating PUD devmap\n");
> - pud = pfn_pud(pfn, prot);
> + pud = pfn_pud(args->fixed_pud_pfn, args->page_prot);
> WARN_ON(!pud_devmap(pud_mkdevmap(pud)));
> }
> #else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
> -static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> +static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
> #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
> #else /* CONFIG_TRANSPARENT_HUGEPAGE */
> -static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> -static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> +static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { }
> +static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
> #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
> #else
> -static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> -static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> -static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
> +static void __init pte_devmap_tests(struct pgtable_debug_args *args) { }
> +static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { }
> +static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
> #endif /* CONFIG_ARCH_HAS_PTE_DEVMAP */
>
> static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
> @@ -1237,7 +1237,7 @@ static int __init debug_vm_pgtable(void)
> pmd_t *pmdp, *saved_pmdp, pmd;
> pte_t *ptep;
> pgtable_t saved_ptep;
> - pgprot_t prot, protnone;
> + pgprot_t prot;
> phys_addr_t paddr;
> unsigned long vaddr, pte_aligned, pmd_aligned;
> unsigned long pud_aligned;
> @@ -1257,12 +1257,6 @@ static int __init debug_vm_pgtable(void)
> return 1;
> }
>
> - /*
> - * __P000 (or even __S000) will help create page table entries with
> - * PROT_NONE permission as required for pxx_protnone_tests().
> - */
> - protnone = __P000;
> -
> vma = vm_area_alloc(mm);
> if (!vma) {
> pr_err("vma allocation failed\n");
> @@ -1337,13 +1331,13 @@ static int __init debug_vm_pgtable(void)
> pte_savedwrite_tests(&args);
> pmd_savedwrite_tests(&args);
>
> - pte_special_tests(pte_aligned, prot);
> - pte_protnone_tests(pte_aligned, protnone);
> - pmd_protnone_tests(pmd_aligned, protnone);
> + pte_special_tests(&args);
> + pte_protnone_tests(&args);
> + pmd_protnone_tests(&args);
>
> - pte_devmap_tests(pte_aligned, prot);
> - pmd_devmap_tests(pmd_aligned, prot);
> - pud_devmap_tests(pud_aligned, prot);
> + pte_devmap_tests(&args);
> + pmd_devmap_tests(&args);
> + pud_devmap_tests(&args);
>
> pte_soft_dirty_tests(pte_aligned, prot);
> pmd_soft_dirty_tests(pmd_aligned, prot);
>
Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
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