btrfs: btrfs_wait_tree_block_writeback can be void return

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Nothing checks its return value.

Is it safe to skip checking return value of btrfs_wait_tree_block_writeback?

Liu Bo: I think yes, it's used in walk_log_tree which is called in two
places, free_log_tree and log replay.  For free_log_tree, it waits for
any running writeback of the extent buffer under freeing to finish in
case we need to access the eb pointer from page->private, and it's OK to
not check the return value, while for log replay, it's doesn't wait
because wc->wait is not set. So neither cares about the writeback error.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
[ added more explanation to changelog, from Liu Bo ]
Signed-off-by: David Sterba <dsterba@suse.com>

...

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Jeff Layton 2017-05-25 06:39:52 -04:00 • committed by David Sterba

parent 118c701e20

commit 3189ff7786

2 changed files with 4 additions and 4 deletions

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6

fs/btrfs/disk-io.c

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2

fs/btrfs/disk-io.h

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