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

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Date:   Fri, 29 Mar 2019 17:19:35 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Michal Hocko <mhocko@...nel.org>
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 03/29/19 at 10:13am, Michal Hocko wrote:
> 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.

Sure, will rewrite the log and add people's Acked-by tag. Thanks.

> 
> > ---
> > 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