[mmotm:master 187/302] mm/page_io.c:405:18: error: 'REQ_HIPRI' undeclared; did you mean 'RWF_HIPRI'?

[kbuild test robot <lkp@intel.com>]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   6d5b029d523e959579667282e713106a29c193d2
commit: 80509a64e354a3de67cfe4dee1cf51c8a2512e44 [187/302] mm/page_io.c: fix polled swap page in
config: x86_64-rhel-7.2-clear (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 80509a64e354a3de67cfe4dee1cf51c8a2512e44
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the mmotm/master HEAD 6d5b029d523e959579667282e713106a29c193d2 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   mm/page_io.c: In function 'swap_readpage':
>> mm/page_io.c:405:18: error: 'REQ_HIPRI' undeclared (first use in this function); did you mean 'RWF_HIPRI'?
      bio->bi_opf |= REQ_HIPRI;
                     ^~~~~~~~~
                     RWF_HIPRI
   mm/page_io.c:405:18: note: each undeclared identifier is reported only once for each function it appears in

vim +405 mm/page_io.c

   350	
   351	int swap_readpage(struct page *page, bool synchronous)
   352	{
   353		struct bio *bio;
   354		int ret = 0;
   355		struct swap_info_struct *sis = page_swap_info(page);
   356		blk_qc_t qc;
   357		struct gendisk *disk;
   358	
   359		VM_BUG_ON_PAGE(!PageSwapCache(page) && !synchronous, page);
   360		VM_BUG_ON_PAGE(!PageLocked(page), page);
   361		VM_BUG_ON_PAGE(PageUptodate(page), page);
   362		if (frontswap_load(page) == 0) {
   363			SetPageUptodate(page);
   364			unlock_page(page);
   365			goto out;
   366		}
   367	
   368		if (sis->flags & SWP_FS) {
   369			struct file *swap_file = sis->swap_file;
   370			struct address_space *mapping = swap_file->f_mapping;
   371	
   372			ret = mapping->a_ops->readpage(swap_file, page);
   373			if (!ret)
   374				count_vm_event(PSWPIN);
   375			return ret;
   376		}
   377	
   378		ret = bdev_read_page(sis->bdev, swap_page_sector(page), page);
   379		if (!ret) {
   380			if (trylock_page(page)) {
   381				swap_slot_free_notify(page);
   382				unlock_page(page);
   383			}
   384	
   385			count_vm_event(PSWPIN);
   386			return 0;
   387		}
   388	
   389		ret = 0;
   390		bio = get_swap_bio(GFP_KERNEL, page, end_swap_bio_read);
   391		if (bio == NULL) {
   392			unlock_page(page);
   393			ret = -ENOMEM;
   394			goto out;
   395		}
   396		disk = bio->bi_disk;
   397		/*
   398		 * Keep this task valid during swap readpage because the oom killer may
   399		 * attempt to access it in the page fault retry time check.
   400		 */
   401		get_task_struct(current);
   402		bio->bi_private = current;
   403		bio_set_op_attrs(bio, REQ_OP_READ, 0);
   404		if (synchronous)
 > 405			bio->bi_opf |= REQ_HIPRI;
   406		count_vm_event(PSWPIN);
   407		bio_get(bio);
   408		qc = submit_bio(bio);
   409		while (synchronous) {
   410			set_current_state(TASK_UNINTERRUPTIBLE);
   411			if (!READ_ONCE(bio->bi_private))
   412				break;
   413	
   414			if (!blk_poll(disk->queue, qc))
   415				io_schedule();
   416		}
   417		__set_current_state(TASK_RUNNING);
   418		bio_put(bio);
   419	
   420	out:
   421		return ret;
   422	}
   423	

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