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Subjectlinux-next: build failure after merge of the block tree
Hi all,

After merging the block tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

fs/xfs/xfs_aops.c: In function 'xfs_add_to_ioend':
fs/xfs/xfs_aops.c:799:2: error: implicit declaration of function 'wbc_account_io'; did you mean 'blk_account_rq'? [-Werror=implicit-function-declaration]
wbc_account_io(wbc, page, len);

Caused by commit

34e51a5e1a6e ("blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()")

interacting with commit

adfb5fb46af0 ("xfs: implement cgroup aware writeback")

from the xfs tree.

I have applied the following merge fix patch:

From: Stephen Rothwell <>
Date: Thu, 11 Jul 2019 15:01:54 +1000
Subject: [PATCH] xfs: fix up for wbc_account_io rename

Signed-off-by: Stephen Rothwell <>
fs/xfs/xfs_aops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 761248ee2778..f16d5f196c6b 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -796,7 +796,7 @@ xfs_add_to_ioend(

wpc->ioend->io_size += len;
- wbc_account_io(wbc, page, len);
+ wbc_account_cgroup_owner(wbc, page, len);

Stephen Rothwell
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