On Mon, Aug 07, 2017 at 06:18:35PM +0800, Coly Li wrote:
> On 2017/8/7 下午4:38, Byungchul Park wrote:
> > Although llist provides proper APIs, they are not used. Make them used.
> >
> > Signed-off-by: Byungchul Park <byungchul.park@xxxxxxx
> Only have a question about why not using llist_for_each_entry(), it's
Hello,
The reason is to keep the original logic unchanged. The logic already
does as if it's the safe version against removal.
> still OK with llist_for_each_entry_safe(). The rested part is good to me.
>
> Acked-by: Coly Li <colyli@xxxxxxx>
>
> > ---
> > drivers/md/bcache/closure.c | 17 +++--------------
> > 1 file changed, 3 insertions(+), 14 deletions(-)
> >
> > diff --git a/drivers/md/bcache/closure.c b/drivers/md/bcache/closure.c
> > index 864e673..1841d03 100644
> > --- a/drivers/md/bcache/closure.c
> > +++ b/drivers/md/bcache/closure.c
> > @@ -64,27 +64,16 @@ void closure_put(struct closure *cl)
> > void __closure_wake_up(struct closure_waitlist *wait_list)
> > {
> > struct llist_node *list;
> > - struct closure *cl;
> > + struct closure *cl, *t;
> > struct llist_node *reverse = NULL;
> >
> > list = llist_del_all(&wait_list->list);
> >
> > /* We first reverse the list to preserve FIFO ordering and fairness */
> > -
> > - while (list) {
> > - struct llist_node *t = list;
> > - list = llist_next(list);
> > -
> > - t->next = reverse;
> > - reverse = t;
> > - }
> > + reverse = llist_reverse_order(list);
> >
> > /* Then do the wakeups */
> > -
> > - while (reverse) {
> > - cl = container_of(reverse, struct closure, list);
> > - reverse = llist_next(reverse);
> > -
> > + llist_for_each_entry_safe(cl, t, reverse, list) {
>
> Just wondering why not using llist_for_each_entry(), or you use the
> _safe version on purpose ?
If I use llist_for_each_entry(), then it would change the original
behavior. Is it ok?
Thank you,
Byungchul
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