Re: [PATCH] mm/page_alloc: fix gcc compile warning

[David Hildenbrand]

On 23.10.19 15:48, Chen Wandun wrote:
> From: Chenwandun <chenwandun@xxxxxxxxxx>
> 
> mm/page_alloc.o: In function `page_alloc_init_late':
> mm/page_alloc.c:1956: undefined reference to `zone_pcp_update'
> mm/page_alloc.o:(.debug_addr+0x8350): undefined reference to `zone_pcp_update'
> make: *** [vmlinux] Error 1
> 
> zone_pcp_update is defined in CONFIG_MEMORY_HOTPLUG,
> so add ifdef when calling zone_pcp_update.
> 
> Signed-off-by: Chenwandun <chenwandun@xxxxxxxxxx>
> ---
>  mm/page_alloc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index f9488ef..8513150 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -1952,8 +1952,10 @@ void __init page_alloc_init_late(void)
>  	 * so the pcpu batch and high limits needs to be updated or the limits
>  	 * will be artificially small.
>  	 */
> +#ifdef CONFIG_MEMORY_HOTPLUG
>  	for_each_populated_zone(zone)
>  		zone_pcp_update(zone);
> +#endif
>  
>  	/*
>  	 * We initialized the rest of the deferred pages.  Permanently disable
> 

See

https://lkml.org/lkml/2019/10/23/206

-- 

Thanks,

David / dhildenb