linux-kernel - linux-next: build failure after merge of the block tree

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Date:   Wed, 16 Jan 2019 13:48:24 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ming Lei <ming.lei@...hat.com>, Christoph Hellwig <hch@....de>,
        Omar Sandoval <osandov@...com>
Subject: linux-next: build failure after merge of the block tree

Hi all,

After merging the block tree, today's linux-next build (x86_64
allmodconfig) failed like this:

fs/gfs2/lops.c: In function 'gfs2_end_log_read':
fs/gfs2/lops.c:394:39: error: macro "bio_for_each_segment_all" requires 4 arguments, but only 3 given
  bio_for_each_segment_all(bvec, bio, i) {
                                       ^
fs/gfs2/lops.c:394:2: error: 'bio_for_each_segment_all' undeclared (first use in this function); did you mean 'bio_first_page_all'?
  bio_for_each_segment_all(bvec, bio, i) {
  ^~~~~~~~~~~~~~~~~~~~~~~~
  bio_first_page_all
fs/gfs2/lops.c:394:2: note: each undeclared identifier is reported only once for each function it appears in
fs/gfs2/lops.c:394:26: error: expected ';' before '{' token
  bio_for_each_segment_all(bvec, bio, i) {
                          ^              ~
                          ;

Caused by commit

  eb754eb2a953 ("block: allow bio_for_each_segment_all() to iterate over multi-page bvec")

One instance of bio_for_each_segment_all() was missed.

I have applied the following fix patch for today.

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Wed, 16 Jan 2019 13:44:02 +1100
Subject: [PATCH] block: fix up for bio_for_each_segment_all() API change

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 fs/gfs2/lops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index ef68bf6232e7..15deefeaafd0 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -390,8 +390,9 @@ static void gfs2_end_log_read(struct bio *bio)
 	struct page *page;
 	struct bio_vec *bvec;
 	int i;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, i, iter_all) {
 		page = bvec->bv_page;
 		if (bio->bi_status) {
 			int err = blk_status_to_errno(bio->bi_status);
-- 
2.20.1

-- 
Cheers,
Stephen Rothwell

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