Re: [PATCH 3/6] mm/migrate: Add copy_pages_mthread function

[Anshuman Khandual]

On 02/17/2017 05:57 PM, kbuild test robot wrote:
> Hi Zi,
> 
> [auto build test WARNING on linus/master]
> [also build test WARNING on v4.10-rc8 next-20170216]
> [if your patch is applied to the wrong git tree, please drop us a note to 
> help improve the system]
> 
> url:    
> https://github.com/0day-ci/linux/commits/Anshuman-Khandual/Enable-parallel-page-migration/20170217-200523
> config: i386-tinyconfig (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All warnings (new ones prefixed by >>):
> 
>    mm/copy_pages_mthread.c: In function 'copy_pages_mthread':
>>> mm/copy_pages_mthread.c:49:10: warning: assignment discards 'const' 
>>> qualifier from pointer target type [-Wdiscarded-qualifiers]
>      cpumask = cpumask_of_node(node);

My bad. This fixes the above warning. Will fix it up next time
around.

diff --git a/mm/copy_pages_mthread.c b/mm/copy_pages_mthread.c
index 9ad2ef6..46b22b1 100644
--- a/mm/copy_pages_mthread.c
+++ b/mm/copy_pages_mthread.c
@@ -46,7 +46,7 @@ int copy_pages_mthread(struct page *to, struct page
*from, int nr_pages)
        int cpu_id_list[32] = {0};

        node = page_to_nid(to);
-       cpumask = cpumask_of_node(node);
+       cpumask = (struct cpumask *) cpumask_of_node(node);
        cthreads = nr_copythreads;
        cthreads = min_t(unsigned int, cthreads, cpumask_weight(cpumask));
        cthreads = (cthreads / 2) * 2;