linux-kernel - Re: [PATCH 3/5] Staging: panel: Remove ULL

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Message-ID: <CAKb7UviQSm+57Ld1XXmEx4andt3TBt11N8nDjJ9Tq2XK1VJJqw@mail.gmail.com>
Date:	Tue, 29 Dec 2015 15:59:26 -0500
From:	Ilia Mirkin <imirkin@...m.mit.edu>
To:	Ksenija Stanojevic <ksenija.stanojevic@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, willy@...a-x.org,
	devel@...verdev.osuosl.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/5] Staging: panel: Remove ULL

On Tue, Dec 29, 2015 at 3:08 PM, Ksenija Stanojevic
<ksenija.stanojevic@...il.com> wrote:
> Remove ULL since it's useless.
>
> Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@...il.com>
> ---
>  drivers/staging/panel/panel.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
> index 7138ee7..6dc3efb 100644
> --- a/drivers/staging/panel/panel.c
> +++ b/drivers/staging/panel/panel.c
> @@ -2047,10 +2047,10 @@ static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value,
>         u8 im, om;
>         __u64 m, v;
>
> -       om = 0ULL;
> -       im = 0ULL;
> -       m = 0ULL;
> -       v = 0ULL;
> +       om = 0;
> +       im = 0;
> +       m = 0;
> +       v = 0;
>         while (*name) {
>                 int in, out, bit, neg;
>
> @@ -2076,9 +2076,9 @@ static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value,
>
>                 bit = (out * 5) + in;
>
> -               m |= 1ULL << bit;
> +               m |= 1 << bit;

m and v are 64-bit, if bit can be >= 32, then you definitely do need
the ULL here...

>                 if (!neg)
> -                       v |= 1ULL << bit;
> +                       v |= 1 << bit;
>                 name++;
>         }
>         *mask = m;
> --
> 1.9.1
>
> --
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