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Subject: Re: [PATCH 1/1] mm/early_ioremap.c: remove redundant
 early_ioremap_shutdown()
To:     Weizhao Ouyang <o451686892@gmail.com>, arnd@arndb.de,
        akpm@linux-foundation.org
Cc:     linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
References: <20210901082917.399953-1-o451686892@gmail.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
Message-ID: <7ca43a9f-b62d-26df-0b9c-1cfa2f7dc611@redhat.com>
Date:   Wed, 1 Sep 2021 12:11:04 +0200
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On 01.09.21 10:29, Weizhao Ouyang wrote:
> early_ioremap_reset() reserved a weak function so that architectures can
> provide a specific cleanup. Now no architectures use it, remove this
> redundant function.
> 
> Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
> ---
>   include/asm-generic/early_ioremap.h | 6 ------
>   mm/early_ioremap.c                  | 5 -----
>   2 files changed, 11 deletions(-)
> 
> diff --git a/include/asm-generic/early_ioremap.h b/include/asm-generic/early_ioremap.h
> index 9def22e6e2b3..9d0479f50f97 100644
> --- a/include/asm-generic/early_ioremap.h
> +++ b/include/asm-generic/early_ioremap.h
> @@ -19,12 +19,6 @@ extern void *early_memremap_prot(resource_size_t phys_addr,
>   extern void early_iounmap(void __iomem *addr, unsigned long size);
>   extern void early_memunmap(void *addr, unsigned long size);
>   
> -/*
> - * Weak function called by early_ioremap_reset(). It does nothing, but
> - * architectures may provide their own version to do any needed cleanups.
> - */
> -extern void early_ioremap_shutdown(void);
> -
>   #if defined(CONFIG_GENERIC_EARLY_IOREMAP) && defined(CONFIG_MMU)
>   /* Arch-specific initialization */
>   extern void early_ioremap_init(void);
> diff --git a/mm/early_ioremap.c b/mm/early_ioremap.c
> index 164607c7cdf1..74984c23a87e 100644
> --- a/mm/early_ioremap.c
> +++ b/mm/early_ioremap.c
> @@ -38,13 +38,8 @@ pgprot_t __init __weak early_memremap_pgprot_adjust(resource_size_t phys_addr,
>   	return prot;
>   }
>   
> -void __init __weak early_ioremap_shutdown(void)
> -{
> -}
> -
>   void __init early_ioremap_reset(void)
>   {
> -	early_ioremap_shutdown();
>   	after_paging_init = 1;
>   }
>   
> 

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Thanks,

David / dhildenb