[PATCH] mm/memory_hotplug: remove an unused variable in move_pfn_range_to_zone()

[PATCH] mm/memory_hotplug: remove an unused variable in move_pfn_range_to_zone()

[Wei Yang]

There is an unused variable in move_pfn_range_to_zone().

This patch just removes it.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 mm/memory_hotplug.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 514014dde16b..16167c92bbf1 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -899,7 +899,6 @@ void __ref move_pfn_range_to_zone(struct zone *zone,
 	struct pglist_data *pgdat = zone->zone_pgdat;
 	int nid = pgdat->node_id;
 	unsigned long flags;
-	unsigned long i;
 
 	if (zone_is_empty(zone))
 		init_currently_empty_zone(zone, start_pfn, nr_pages);
-- 
2.11.0

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Re: [PATCH] mm/memory_hotplug: remove an unused variable in move_pfn_range_to_zone()

[Anshuman Khandual]

On 06/27/2017 04:49 AM, Wei Yang wrote:
> There is an unused variable in move_pfn_range_to_zone().
> 
> This patch just removes it.
> 
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
> ---
>  mm/memory_hotplug.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 514014dde16b..16167c92bbf1 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -899,7 +899,6 @@ void __ref move_pfn_range_to_zone(struct zone *zone,
>  	struct pglist_data *pgdat = zone->zone_pgdat;
>  	int nid = pgdat->node_id;
>  	unsigned long flags;
> -	unsigned long i;
>  
>  	if (zone_is_empty(zone))
>  		init_currently_empty_zone(zone, start_pfn, nr_pages);

We have this down in the function. IIRC I had checked out tag
mmotm-2017-06-16-13-59 where I am looking out for this function.

for (i = 0; i < nr_pages; i++) {
	unsigned long pfn = start_pfn + i;
	set_page_links(pfn_to_page(pfn), zone_idx(zone), nid, pfn);
}



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Re: [PATCH] mm/memory_hotplug: remove an unused variable in move_pfn_range_to_zone()

[Michal Hocko]

On Tue 27-06-17 10:26:38, Anshuman Khandual wrote:
> On 06/27/2017 04:49 AM, Wei Yang wrote:
> > There is an unused variable in move_pfn_range_to_zone().
> > 
> > This patch just removes it.
> > 
> > Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
> > ---
> >  mm/memory_hotplug.c | 1 -
> >  1 file changed, 1 deletion(-)
> > 
> > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> > index 514014dde16b..16167c92bbf1 100644
> > --- a/mm/memory_hotplug.c
> > +++ b/mm/memory_hotplug.c
> > @@ -899,7 +899,6 @@ void __ref move_pfn_range_to_zone(struct zone *zone,
> >  	struct pglist_data *pgdat = zone->zone_pgdat;
> >  	int nid = pgdat->node_id;
> >  	unsigned long flags;
> > -	unsigned long i;
> >  
> >  	if (zone_is_empty(zone))
> >  		init_currently_empty_zone(zone, start_pfn, nr_pages);
> 
> We have this down in the function. IIRC I had checked out tag
> mmotm-2017-06-16-13-59 where I am looking out for this function.

It's a follow up for
mm-memory_hotplug-do-not-associate-hotadded-memory-to-zones-until-online-fix-2.patch
in mmotm-2017-06-23-15-03

> 
> for (i = 0; i < nr_pages; i++) {
> 	unsigned long pfn = start_pfn + i;
> 	set_page_links(pfn_to_page(pfn), zone_idx(zone), nid, pfn);
> }
> 
> 

-- 
Michal Hocko
SUSE Labs

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