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btrfs: update comment for btrfs_join_transaction_nostart()

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Update the comment for btrfs_join_transaction_nostart() to be more clear
about how it works and how it's different from btrfs_attach_transaction().

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2023-07-26 16:56:58 +01:00 committed by David Sterba
parent 4490e803e1
commit 19288951ff
1 changed files with 4 additions and 1 deletions
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5
fs/btrfs/transaction.c
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@ -799,7 +799,10 @@ struct btrfs_trans_handle *btrfs_join_transaction_spacecache(struct btrfs_root *
/*
* Similar to regular join but it never starts a transaction when none is
* running or after waiting for the current one to finish.
* running or when there's a running one at a state >= TRANS_STATE_UNBLOCKED.
* This is similar to btrfs_attach_transaction() but it allows the join to
* happen if the transaction commit already started but it's not yet in the
* "doing" phase (the state is < TRANS_STATE_COMMIT_DOING).
*/
struct btrfs_trans_handle *btrfs_join_transaction_nostart(struct btrfs_root *root)
{