linux-kernel - Re: [PATCH 02/12] mm: page_alloc: move init_on_alloc/free() into mm

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Date:   Tue, 9 May 2023 09:38:37 -0700
From:   Mike Rapoport <rppt@...nel.org>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 02/12] mm: page_alloc: move init_on_alloc/free() into
 mm_init.c

On Mon, May 08, 2023 at 03:11:50PM +0800, Kefeng Wang wrote:
> Since commit f2fc4b44ec2b ("mm: move init_mem_debugging_and_hardening()
> to mm/mm_init.c"), the init_on_alloc() and init_on_free() define is
> better to move there too.
> 
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>

Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>

> ---
>  mm/mm_init.c    | 6 ++++++
>  mm/page_alloc.c | 5 -----
>  2 files changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/mm/mm_init.c b/mm/mm_init.c
> index da162b7a044c..15201887f8e0 100644
> --- a/mm/mm_init.c
> +++ b/mm/mm_init.c
> @@ -2543,6 +2543,12 @@ void __init memblock_free_pages(struct page *page, unsigned long pfn,
>  	__free_pages_core(page, order);
>  }
>  
> +DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_ALLOC_DEFAULT_ON, init_on_alloc);
> +EXPORT_SYMBOL(init_on_alloc);
> +
> +DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_FREE_DEFAULT_ON, init_on_free);
> +EXPORT_SYMBOL(init_on_free);
> +
>  static bool _init_on_alloc_enabled_early __read_mostly
>  				= IS_ENABLED(CONFIG_INIT_ON_ALLOC_DEFAULT_ON);
>  static int __init early_init_on_alloc(char *buf)
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index d1086aeca8f2..4f094ba7c8fb 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -233,11 +233,6 @@ unsigned long totalcma_pages __read_mostly;
>  
>  int percpu_pagelist_high_fraction;
>  gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK;
> -DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_ALLOC_DEFAULT_ON, init_on_alloc);
> -EXPORT_SYMBOL(init_on_alloc);
> -
> -DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_FREE_DEFAULT_ON, init_on_free);
> -EXPORT_SYMBOL(init_on_free);
>  
>  /*
>   * A cached value of the page's pageblock's migratetype, used when the page is
> -- 
> 2.35.3
>