On Mon, Nov 15, 2021 at 02:13:44PM +0800, Leizhen (ThunderTown) wrote:
>
>
> On 2021/11/15 12:25, Matthew Wilcox wrote:
> > On Mon, Nov 15, 2021 at 11:57:20AM +0800, Zhen Lei wrote:
> >> if (!buf->len) {
> >> + unsigned int __maybe_unused flags = buf->flags;
> >
> > Why __maybe_unused?
>
> It's used only if "#ifdef CONFIG_WATCH_QUEUE". Otherwise, a warning will be reported.
Better to turn the #ifdef into if (IS_ENABLED())
