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mm: export bdi_unregister 

Patch series "simplify bdi unregistation".

This series simplifies the BDI code to get rid of the magic
auto-unregister feature that hid a recent block layer refcounting bug.

This patch (of 5):

To wind down the magic auto-unregister semantics we'll need to push this
into modular code.

Link: https://lkml.kernel.org/r/20211021124441.668816-1-hch@lst.de
Link: https://lkml.kernel.org/r/20211021124441.668816-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2021-11-05 13:36:52 -07:00 committed by Linus Torvalds
parent 8c8387ee3f
commit c6fd3ac0fc
1 changed files with 1 additions and 0 deletions
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1
mm/backing-dev.c
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@ -958,6 +958,7 @@ void bdi_unregister(struct backing_dev_info *bdi)
bdi->owner = NULL;
}
}
EXPORT_SYMBOL(bdi_unregister);
static void release_bdi(struct kref *ref)
{