linux-kernel - Re: [PATCH v3 2/2] drivers/base/memory.c: Rename the misleading parameter

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Message-ID: <20190329091325.GD28616@dhcp22.suse.cz>
Date:   Fri, 29 Mar 2019 10:13:25 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        rafael@...nel.org, akpm@...ux-foundation.org, osalvador@...e.de,
        rppt@...ux.ibm.com, willy@...radead.org, fanc.fnst@...fujitsu.com
Subject: Re: [PATCH v3 2/2] drivers/base/memory.c: Rename the misleading
 parameter

On Fri 29-03-19 16:29:15, 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.

I have tried to explain that the naming is mostly a relict from the past
than really a misleading name http://lkml.kernel.org/r/20190326093315.GL28406@dhcp22.suse.cz
Maybe it would be good to reflect that in the changelog
 
> Signed-off-by: Baoquan He <bhe@...hat.com>

btw. I've acked the previous version as well.

> ---
> v2->v3:
>   Rename the parameter to 'start_section_nr' from 'sec'.
> 
>  drivers/base/memory.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index cb8347500ce2..9ea972b2ae79 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -231,13 +231,14 @@ 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 start_section_nr, 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(start_section_nr);
>  
>  	switch (action) {
>  	case MEM_ONLINE:
> @@ -251,7 +252,7 @@ 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__, start_section_nr, action, action);
>  		ret = -EINVAL;
>  	}
>  
> -- 
> 2.17.2
> 

-- 
Michal Hocko
SUSE Labs