2012/10/23 18:37, Michal Hocko wrote:
> 340175b7 (mm/hotplug: free zone->pageset when a zone becomes empty)
> introduced zone_pcp_reset and hided it inside CONFIG_MEMORY_HOTREMOVE.
> The function is since 506e5fb7 (memory-hotplug: allocate zone's pcp
> before onlining pages) called also called from online_pages which
> is called outside CONFIG_MEMORY_HOTREMOVE which causes a linkage error.
>
> The function, although not used outside of MEMORY_{HOTPLUT,HOTREMOVE},
> seems like universal enough so let's keep it at its current location
> and only remove the HOTREMOVE guard.
>
> Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
> Cc: David Rientjes <rientjes@xxxxxxxxxx>
> Cc: Jiang Liu <liuj97@xxxxxxxxx>
> Cc: Len Brown <len.brown@xxxxxxxxx>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Cc: Christoph Lameter <cl@xxxxxxxxx>
> Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Looks goot to me.
Reviewd-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Thanks,
Yasuki Ishimatsu
> Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
> Cc: Mel Gorman <mel@xxxxxxxxx>
> ---
> mm/page_alloc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index e29912e..30e359c 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -5981,7 +5981,6 @@ void __meminit zone_pcp_update(struct zone *zone)
> }
> #endif
>
> -#ifdef CONFIG_MEMORY_HOTREMOVE
> void zone_pcp_reset(struct zone *zone)
> {
> unsigned long flags;
> @@ -6001,6 +6000,7 @@ void zone_pcp_reset(struct zone *zone)
> local_irq_restore(flags);
> }
>
> +#ifdef CONFIG_MEMORY_HOTREMOVE
> /*
> * All pages in the range must be isolated before calling this.
> */
>
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