Hi,
On Sat, 2017-05-20 at 21:19 +0200, Greg Kroah-Hartman wrote:
> On Sun, May 21, 2017 at 02:05:31AM +0900, Masahiro Yamada wrote:
> > The combo of list_empty() and list_first_entry() can be replaced with
> > list_first_entry_or_null().
> >
> > Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> > ---
> >
> > drivers/usb/mtu3/mtu3.h | 8 ++------
> > 1 file changed, 2 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
> > index aa6fd6a..7b6dc23 100644
> > --- a/drivers/usb/mtu3/mtu3.h
> > +++ b/drivers/usb/mtu3/mtu3.h
> > @@ -356,12 +356,8 @@ static inline struct mtu3_ep *to_mtu3_ep(struct usb_ep *ep)
> >
> > static inline struct mtu3_request *next_request(struct mtu3_ep *mep)
> > {
> > - struct list_head *queue = &mep->req_list;
> > -
> > - if (list_empty(queue))
> > - return NULL;
> > -
> > - return list_first_entry(queue, struct mtu3_request, list);
> > + return list_first_entry_or_null(&mep->req_list, struct mtu3_request,
> > + list);
>
> Even better, why is this an inlined function at all? Why not just have
> it "open coded" everywhere it is used?
>
This can avoid repeated function definition, currently it is used in
three files.
> thanks,
>
> greg k-h
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