btrfs: handle NULL roots in btrfs_put/btrfs_grab_fs_root

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We want to use this for dropping all roots, and in some error cases we
may not have a root, so handle this to make the cleanup code easier.
Make btrfs_grab_fs_root the same so we can use it in cases where the
root may not exist (like the quota root).

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Josef Bacik 2020-01-24 09:32:26 -05:00 • committed by David Sterba

parent a98db0f304

commit 4cdfd93002

1 changed files with 4 additions and 0 deletions

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fs/btrfs/disk-io.h

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