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Re: [PATCH v2 1/5] bitops: Introduce assign_bit()




On Thu, 12 Oct 2017 12:40:10 +0200 Lukas Wunner <lukas@xxxxxxxxx> wrote:

> A common idiom is to assign a value to a bit with:
> 
>     if (value)
>         set_bit(nr, addr);
>     else
>         clear_bit(nr, addr);
> 
> Likewise common is the one-line expression variant:
> 
>     value ? set_bit(nr, addr) : clear_bit(nr, addr);
> 
> Commit 9a8ac3ae682e ("dm mpath: cleanup QUEUE_IF_NO_PATH bit
> manipulation by introducing assign_bit()") introduced assign_bit()
> to the md subsystem for brevity.
> 
> Make it available to others, specifically gpiolib and the upcoming
> driver for Maxim MAX3191x industrial serializer chips.
> 
> As requested by Peter Zijlstra, change the argument order to reflect
> traditional "dst = src" in C, hence "assign_bit(nr, addr, value)".

Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>