From: Christoph Hellwig <hch@xxxxxx> 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@xxxxxx Link: https://lkml.kernel.org/r/20211021124441.668816-2-hch@xxxxxx Signed-off-by: Christoph Hellwig <hch@xxxxxx> Reviewed-by: Jan Kara <jack@xxxxxxx> Cc: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> Cc: Richard Weinberger <richard@xxxxxx> Cc: Vignesh Raghavendra <vigneshr@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/backing-dev.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/backing-dev.c~mm-export-bdi_unregister +++ a/mm/backing-dev.c @@ -958,6 +958,7 @@ void bdi_unregister(struct backing_dev_i bdi->owner = NULL; } } +EXPORT_SYMBOL(bdi_unregister); static void release_bdi(struct kref *ref) { _
