linux-kernel - Re: [PATCH 06/21] mfd: prepare to generalize BITS() macro

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Message-ID: <20251106164814.GA1949330@google.com>
Date: Thu, 6 Nov 2025 16:48:14 +0000
From: Lee Jones <lee@...nel.org>
To: "Yury Norov (NVIDIA)" <yury.norov@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Nicolas Frattaroli <nicolas.frattaroli@...labora.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: [PATCH 06/21] mfd: prepare to generalize BITS() macro

On Sat, 25 Oct 2025, Yury Norov (NVIDIA) wrote:

> In preparation for adding generic BITS() macro, add an #undef directive
> for the existing BITS(). The following patches will drop it entirely.
> 
> Signed-off-by: Yury Norov (NVIDIA) <yury.norov@...il.com>
> ---
>  drivers/mfd/db8500-prcmu-regs.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mfd/db8500-prcmu-regs.h b/drivers/mfd/db8500-prcmu-regs.h
> index 75fd1069372c..25d2d5966211 100644
> --- a/drivers/mfd/db8500-prcmu-regs.h
> +++ b/drivers/mfd/db8500-prcmu-regs.h
> @@ -12,6 +12,7 @@
>  #ifndef __DB8500_PRCMU_REGS_H
>  #define __DB8500_PRCMU_REGS_H
>  
> +#undef BITS

Doesn't this get removed in 2 patches time?

>  #define BITS(_start, _end) ((BIT(_end) - BIT(_start)) + BIT(_end))
>  
>  #define PRCM_ACLK_MGT		(0x004)
> -- 
> 2.43.0
> 

-- 
Lee Jones [李琼斯]