Re: [PATCH v3 4/4] PM: submit bio in a sane way in cases without bio_chain

[Pavel Machek <pavel@ucw.cz>]

On Thu 2015-04-30 18:47:17, Pavel Machek wrote:
> Hi!
> 
> > >From af56dde07c34b203f5c40c8864bfd55697b0aad0 Mon Sep 17 00:00:00 2001
> > From: Christoph Hellwig <hch@lst.de>
> > Date: Fri, 24 Apr 2015 11:26:00 +0200
> > Subject: suspend: sane block I/O handling
> > 
> > stop abusing struct page functionality and the swap end_io handler, and
> > instead add a modified version of the blk-lib.c bio_batch helpers.
> > 
> > Also move the block I/O code into swap.c as they are directly tied into
> > each other.
> > 
> > Signed-off-by: Christoph Hellwig <hch@lst.de>
> 
> Tested-by: Pavel Machek <pavel@ucw.cz>
> Acked-by: Pavel Machek <pavel@ucw.cz>
> 
> (thinkpad x60 in shutdown mode, platform mode has some problems, but
> they are probably not related).

There seems to be extra trailing whitespace in this function:

+static void hib_end_io(struct bio *bio, int error)
+{
+       struct hib_bio_batch *hb = bio->bi_private;
+       const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
+       struct page *page = bio->bi_io_vec[0].bv_page;
+
+       if (!uptodate || error) {
+               printk(KERN_ALERT "Read-error on swap-device
(%u:%u:%Lu)\n",
+                               imajor(bio->bi_bdev->bd_inode),
+                               iminor(bio->bi_bdev->bd_inode),
+                               (unsigned long
long)bio->bi_iter.bi_sector);
+
+               if (!error)
+                       error = -EIO;
+       }
+
+       if (bio_data_dir(bio) == WRITE)
+               put_page(page);


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