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SubjectRe: [PATCH v3 09/11] Input: alps - remove unlikely() from IS_ERR*() condition
On Thu, Aug 29, 2019 at 07:50:23PM +0300, Denis Efremov wrote:
> "unlikely(IS_ERR_OR_NULL(x))" is excessive. IS_ERR_OR_NULL() already uses
> unlikely() internally.

The keyword here is _internally_.

https://lore.kernel.org/lkml/20190821174857.GD76194@dtor-ws/

So please no.

>
> Signed-off-by: Denis Efremov <efremov@linux.com>
> Cc: "Pali Rohár" <pali.rohar@gmail.com>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: Joe Perches <joe@perches.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: linux-input@vger.kernel.org
> ---
> drivers/input/mouse/alps.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
> index 34700eda0429..ed1661434899 100644
> --- a/drivers/input/mouse/alps.c
> +++ b/drivers/input/mouse/alps.c
> @@ -1476,7 +1476,7 @@ static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
> /* On V2 devices the DualPoint Stick reports bare packets */
> dev = priv->dev2;
> dev2 = psmouse->dev;
> - } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
> + } else if (IS_ERR_OR_NULL(priv->dev3)) {
> /* Register dev3 mouse if we received PS/2 packet first time */
> if (!IS_ERR(priv->dev3))
> psmouse_queue_work(psmouse, &priv->dev3_register_work,
> --
> 2.21.0
>

--
Dmitry

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