+ mm-export-bdi_unregister.patch added to -mm tree

+ mm-export-bdi_unregister.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: export bdi_unregister
has been added to the -mm tree.  Its filename is
     mm-export-bdi_unregister.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-export-bdi_unregister.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-export-bdi_unregister.patch

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------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: 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>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/backing-dev.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/backing-dev.c~mm-export-bdi_unregister
+++ a/mm/backing-dev.c
@@ -965,6 +965,7 @@ void bdi_unregister(struct backing_dev_i
 		bdi->owner = NULL;
 	}
 }
+EXPORT_SYMBOL(bdi_unregister);
 
 static void release_bdi(struct kref *ref)
 {
_

Patches currently in -mm which might be from hch@lst.de are

mm-dont-include-linux-daxh-in-linux-mempolicyh.patch
mm-export-bdi_unregister.patch
mtd-call-bdi_unregister-explicitly.patch
fs-explicitly-unregister-per-superblock-bdis.patch
mm-dont-automatically-unregister-bdis.patch
mm-simplify-bdi-refcounting.patch
mm-unexport-folio_memcg_unlock.patch
mm-unexport-unlock_page_memcg.patch