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[PATCH block/for-linus] block: export bio_associate_*() and wbc_account_io()

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  [PATCH block/for-linus] block: export bio_associate_*() and  wbc_account_io() Tejun Heo <tj@kernel.org> - 2015-07-23 20:30 +0200
    Re: [PATCH block/for-linus] block: export bio_associate_*() and  wbc_account_io() Chris Mason <clm@fb.com> - 2015-07-23 20:40 +0200

#1191207 — [PATCH block/for-linus] 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>
---
Hello, Jens.

While this change isn't strictly necessary for 4.2, I think it'd
better to push it through for-linus so that it's there before any
filesystem specific changes are merged.

Thanks.

 block/bio.c       |    2 ++
 fs/fs-writeback.c |    1 +
 2 files changed, 3 insertions(+)

--- a/block/bio.c
+++ b/block/bio.c
@@ -2009,6 +2009,7 @@ int bio_associate_blkcg(struct bio *bio,
 	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 *bi
 	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()
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -702,6 +702,7 @@ void wbc_account_io(struct writeback_con
 	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
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#1191218

On Thu, Jul 23, 2015 at 02:27:09PM -0400, Tejun Heo wrote:
> 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.

Thanks, these were the only three I needed on the btrfs side.

-chris
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