block: export bio_associate_*() and wbc_account_io()

bio_associate_blkcg(), bio_associate_current() and wbc_account_io()
are used to implement cgroup writeback support for filesystems and
thus need to be exported.  Export them.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/block/bio.c b/block/bio.c
index 2a00d349cd6883cba32d9fd477251889a1c58081..b671a0ff731cb14c652d095bb361b6d807ed4b42 100644 (file)
--- a/block/bio.c
+++ b/block/bio.c
@@ -2009,6 +2009,7 @@ int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css)
        bio->bi_css = blkcg_css;
        return 0;
 }
+EXPORT_SYMBOL_GPL(bio_associate_blkcg);
 
 /**
  * bio_associate_current - associate a bio with %current
@@ -2039,6 +2040,7 @@ int bio_associate_current(struct bio *bio)
        bio->bi_css = task_get_css(current, blkio_cgrp_id);
        return 0;
 }
+EXPORT_SYMBOL_GPL(bio_associate_current);
 
 /**
  * bio_disassociate_task - undo bio_associate_current()

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index f0520bcf209442914eff0ed60d380fb3d2c66402..518c6294bf6c0ef965e9f56baa4e11d2eccc0165 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -702,6 +702,7 @@ void wbc_account_io(struct writeback_control *wbc, struct page *page,
        else
                wbc->wb_tcand_bytes -= min(bytes, wbc->wb_tcand_bytes);
 }
+EXPORT_SYMBOL_GPL(wbc_account_io);
 
 /**
  * inode_congested - test whether an inode is congested