fs: Get proper reference for s_bdi

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So far we just relied on block device to hold a bdi reference for us
while the filesystem is mounted. While that works perfectly fine, it is
a bit awkward that we have a pointer to a refcounted structure in the
superblock without proper reference. So make s_bdi hold a proper
reference to block device's BDI. No filesystem using mount_bdev()
actually changes s_bdi so this is safe and will make bdev filesystems
work the same way as filesystems needing to set up their private bdi.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Jan Kara 2017-04-12 12:24:29 +02:00 • committed by Jens Axboe

parent fca39346a5

commit 13eec2363e

1 changed files with 2 additions and 5 deletions

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fs/super.c

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