linux-kernel - Re: [PATCH] mm: consolidate pgtable_cache_init() and pgd_cache

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Date:   Wed, 21 Aug 2019 08:15:44 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: consolidate pgtable_cache_init() and pgd_cache_init()

On Wed, Aug 21, 2019 at 06:06:58PM +0300, Mike Rapoport wrote:
> +++ b/arch/alpha/include/asm/pgtable.h
> @@ -362,7 +362,6 @@ extern void paging_init(void);
>  /*
>   * No page table caches to initialise
>   */
> -#define pgtable_cache_init()	do { } while (0)

Delete the comment too?

> +++ b/arch/arc/include/asm/pgtable.h
> @@ -398,7 +398,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
>  /*
>   * No page table caches to initialise
>   */
> -#define pgtable_cache_init()   do { } while (0)

ditto

> +++ b/arch/arm/include/asm/pgtable.h
> @@ -368,7 +368,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
>  #define HAVE_ARCH_UNMAPPED_AREA
>  #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
>  
> -#define pgtable_cache_init() do { } while (0)
>  
>  #endif /* !__ASSEMBLY__ */

delete one of the two blank lines?

> +++ b/arch/c6x/include/asm/pgtable.h
> @@ -62,7 +62,6 @@ extern unsigned long empty_zero_page;
>  /*
>   * No page table caches to initialise
>   */
> -#define pgtable_cache_init()   do { } while (0)

delete comment ... more of these.