linux-kernel - Re: [PATCH v2 4/4] drivers/base/memory.c: Rename the misleading parameter

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Date:   Tue, 26 Mar 2019 10:33:15 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org, rppt@...ux.ibm.com, osalvador@...e.de,
        willy@...radead.org, william.kucharski@...cle.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH v2 4/4] drivers/base/memory.c: Rename the misleading
 parameter

On Tue 26-03-19 17:02:27, Baoquan He wrote:
> The input parameter 'phys_index' of memory_block_action() is actually
> the section number, but not the phys_index of memory_block. Fix it.

phys_index is a relict from the past and it indeed denotes the section
number which is exported as phys_index via sysfs. start_section_nr would
be a better name IMHO but nothing to really bike shed about.

> Signed-off-by: Baoquan He <bhe@...hat.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: "Rafael J. Wysocki" <rafael@...nel.org>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
>  drivers/base/memory.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index cb8347500ce2..184f4f8d1b62 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -231,13 +231,13 @@ static bool pages_correctly_probed(unsigned long start_pfn)
>   * OK to have direct references to sparsemem variables in here.
>   */
>  static int
> -memory_block_action(unsigned long phys_index, unsigned long action, int online_type)
> +memory_block_action(unsigned long sec, unsigned long action, int online_type)
>  {
>  	unsigned long start_pfn;
>  	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
>  	int ret;
>  
> -	start_pfn = section_nr_to_pfn(phys_index);
> +	start_pfn = section_nr_to_pfn(sec);
>  
>  	switch (action) {
>  	case MEM_ONLINE:
> @@ -251,7 +251,7 @@ memory_block_action(unsigned long phys_index, unsigned long action, int online_t
>  		break;
>  	default:
>  		WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
> -		     "%ld\n", __func__, phys_index, action, action);
> +		     "%ld\n", __func__, sec, action, action);
>  		ret = -EINVAL;
>  	}
>  
> -- 
> 2.17.2
> 

-- 
Michal Hocko
SUSE Labs