linux-kernel - Re: [PATCH] mm/vmalloc: Replace the ternary conditional operator with min()

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Date:   Fri, 9 Jun 2023 09:48:44 +0100
From:   Lorenzo Stoakes <lstoakes@...il.com>
To:     Lu Hongfei <luhongfei@...o.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Uladzislau Rezki <urezki@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        "open list:VMALLOC" <linux-mm@...ck.org>,
        open list <linux-kernel@...r.kernel.org>,
        opensource.kernel@...o.com
Subject: Re: [PATCH] mm/vmalloc: Replace the ternary conditional operator
 with min()

On Fri, Jun 09, 2023 at 08:09:45AM +0100, Lorenzo Stoakes wrote:
> On Fri, Jun 09, 2023 at 02:13:09PM +0800, Lu Hongfei wrote:
> > It would be better to replace the traditional ternary conditional
> > operator with min() in zero_iter
> >
> > Signed-off-by: Lu Hongfei <luhongfei@...o.com>
> > ---
> >  mm/vmalloc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> > index 29077d61ff81..42df032e6c27
> > --- a/mm/vmalloc.c
> > +++ b/mm/vmalloc.c
> > @@ -3571,7 +3571,7 @@ static size_t zero_iter(struct iov_iter *iter, size_t count)
> >  	while (remains > 0) {
> >  		size_t num, copied;
> >
> > -		num = remains < PAGE_SIZE ? remains : PAGE_SIZE;
> > +		num = min(remains, PAGE_SIZE);

OK, as per the pedantic test bot, you'll need to change this to:-

num = min_t(size_t, remains, PAGE_SIZE);

> >  		copied = copy_page_to_iter_nofault(ZERO_PAGE(0), 0, num, iter);
> >  		remains -= copied;
> >
> > --
> > 2.39.0
> >
>
> Looks good to me, thanks,
>
> Reviewed-by: Lorenzo Stoakes <lstoakes@...il.com>

Please spin up a v2 with this change and then you can take my Reviewed-by tag :)

Cheers, Lorenzo