On 2016-12-21 16:45:06 [+0800], Qu Wenruo wrote:
> > | DECLARE_EVENT_CLASS(btrfs__work__done,
> > |
> > | TP_PROTO(struct btrfs_work *work),
> > |
> > | TP_ARGS(work),
> > |
> > | TP_STRUCT__entry_btrfs(
> > | __field( void *, work )
> > | ),
> > |
> > | TP_fast_assign_btrfs(btrfs_work_owner(work),
> > | __entry->work = work;
> > | ),
> > |
> > | TP_printk_btrfs("work->%p", __entry->work)
> > | );
> >
> > and btrfs_work_owner exapnds to:
> >
> > | struct btrfs_fs_info *
> > | btrfs_work_owner(struct btrfs_work *work)
> > | {
> > | return work->wq->fs_info;
> > | }
> >
> > voilà
>
> Oh I got it, thanks very much.
>
> The btrfs_work_owner() is newly introduced, no wonder I didn't know that.
It was introduced in cb001095ca70 ("btrfs: plumb fs_info into
btrfs_work") which is v4.8-rc1. The usage in trace points started in
bc074524e123 ("btrfs: prefix fsid to all trace events") which is also
v4.8-rc1. So whatever is done to get it fixed, it should be pushed
stable for v4.8+.
> Thanks,
> Qu
Sebastian
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