On Fri, Jun 1, 2012 at 5:08 AM, Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> On Fri, 1 Jun 2012, KOSAKI Motohiro wrote:
>> > mlock_migrate_page(newpage, page);
>> > --- 3.4.0+/mm/page-writeback.c 2012-05-29 08:09:58.304806782 -0700
>> > +++ linux/mm/page-writeback.c 2012-06-01 00:23:43.984116973 -0700
>> > @@ -1987,7 +1987,10 @@ int __set_page_dirty_nobuffers(struct pa
>> > mapping2 = page_mapping(page);
>> > if (mapping2) { /* Race with truncate? */
>> > BUG_ON(mapping2 != mapping);
>> > - WARN_ON_ONCE(!PagePrivate(page)&&
>> > !PageUptodate(page));
>> > + if (WARN_ON(!PagePrivate(page)&&
>> > !PageUptodate(page)))
>> > + print_symbol(KERN_WARNING
>> > + "mapping->a_ops->writepage: %s\n",
>> > + (unsigned
>> > long)mapping->a_ops->writepage);
>>
>> type mismatch?
>
> I don't think so: I just copied from print_bad_pte().
> Probably you're reading "printk" where it's "print_symbol"?
Oops, yes, sorry for noise.
>> I guess you want %pf or %pF.
>
> I expect there is new-fangled %pMagic that can do it too, yes.
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