From: Christoph Hellwig <hch@lst.de>
Date: Mon, 24 Jan 2022 10:10:51 +0100
Subject: [PATCH] nfs/blocklayout: remove bl_alloc_init_bio
Git-commit: 5d2ca2132f889bc2c90d6d07fc9fc129cfee8955
Patch-mainline: v5.18-rc1
References: jsc#PED-1183

bio_alloc will never fail when it can sleep.  Remove the now simple
bl_alloc_init_bio helper and open code it in the only caller.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 fs/nfs/blocklayout/blocklayout.c | 26 +++++---------------------
 1 file changed, 5 insertions(+), 21 deletions(-)

diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index fe860c538747..38e063af7e98 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -115,23 +115,6 @@ bl_submit_bio(struct bio *bio)
 	return NULL;
 }
 
-static struct bio *bl_alloc_init_bio(unsigned int npg,
-		struct block_device *bdev, sector_t disk_sector,
-		bio_end_io_t end_io, struct parallel_io *par)
-{
-	struct bio *bio;
-
-	npg = bio_max_segs(npg);
-	bio = bio_alloc(GFP_NOIO, npg);
-	if (bio) {
-		bio->bi_iter.bi_sector = disk_sector;
-		bio_set_dev(bio, bdev);
-		bio->bi_end_io = end_io;
-		bio->bi_private = par;
-	}
-	return bio;
-}
-
 static bool offset_in_map(u64 offset, struct pnfs_block_dev_map *map)
 {
 	return offset >= map->start && offset < map->start + map->len;
@@ -171,10 +154,11 @@ do_add_page_to_bio(struct bio *bio, int npg, int rw, sector_t isect,
 
 retry:
 	if (!bio) {
-		bio = bl_alloc_init_bio(npg, map->bdev,
-				disk_addr >> SECTOR_SHIFT, end_io, par);
-		if (!bio)
-			return ERR_PTR(-ENOMEM);
+		bio = bio_alloc(GFP_NOIO, bio_max_segs(npg));
+		bio->bi_iter.bi_sector = disk_addr >> SECTOR_SHIFT;
+		bio_set_dev(bio, map->bdev);
+		bio->bi_end_io = end_io;
+		bio->bi_private = par;
 		bio_set_op_attrs(bio, rw, 0);
 	}
 	if (bio_add_page(bio, page, *len, offset) < *len) {
-- 
2.35.3