linux-kernel - Re: [PATCH v1 1/4] spidev: Do not use atomic bit operations when allocating minor

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Message-ID: <YjtNJe4Pgp3WIwOa@sirena.org.uk>
Date:   Wed, 23 Mar 2022 16:39:01 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/4] spidev: Do not use atomic bit operations when
 allocating minor

On Wed, Mar 23, 2022 at 04:02:12PM +0200, Andy Shevchenko wrote:
> There is no need to use atomic bit operations when allocating a minor
> number since it's done under a mutex. Moreover, one of the operations
> that is in use is non-atomic anyway.

>  	if (status == 0) {
> -		set_bit(minor, minors);
> +		__set_bit(minor, minors);
>  		list_add(&spidev->device_entry, &device_list);

There's no *need* but the __ looks suspicious...  what's the upside
here?

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