linux-kernel - Re: [PATCH 00/18] mfd: convert to use maple tree register cache

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Date: Tue, 6 Feb 2024 10:33:22 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Bo Liu <liubo03@...pur.com>
Cc: lee@...nel.org, wens@...e.org, marek.vasut+renesas@...il.com, 
	support.opensource@...semi.com, neil.armstrong@...aro.org, 
	ckeepax@...nsource.cirrus.com, rf@...nsource.cirrus.com, 
	mazziesaccount@...il.com, mcoquelin.stm32@...il.com, 
	alexandre.torgue@...s.st.com, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, linux-amlogic@...ts.infradead.org, 
	patches@...nsource.cirrus.com, linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org, Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH 00/18] mfd: convert to use maple tree register cache

Hi Bo,

CC broonie

Thanks for your series!

On Tue, Feb 6, 2024 at 8:16 AM Bo Liu <liubo03@...pur.com> wrote:
> The maple tree register cache is based on a much more modern data structure
> than the rbtree cache and makes optimisation choices which are probably

probably?

> more appropriate for modern systems than those made by the rbtree cache.
>
> Bo Liu (18):
>   mfd: ac100: convert to use maple tree register cache
>   mfd: as3711: convert to use maple tree register cache
>   mfd: as3722: convert to use maple tree register cache
>   mfd: axp20x: convert to use maple tree register cache
>   mfd: bcm590xx: convert to use maple tree register cache
>   mfd: bd9571mwv: convert to use maple tree register cache
>   mfd: dialog: convert to use maple tree register cache
>   mfd: khadas-mcu: convert to use maple tree register cache
>   mfd: lochnagar-i2c: convert to use maple tree register cache
>   mfd: wolfson: convert to use maple tree register cache
>   mfd: rohm: convert to use maple tree register cache
>   mfd: rk8xx: convert to use maple tree register cache
>   mfd: rn5t618: convert to use maple tree register cache
>   mfd: rsmu_i2c: convert to use maple tree register cache
>   mfd: si476x: convert to use maple tree register cache
>   mfd: stmfx: convert to use maple tree register cache
>   mfd: stpmic1: convert to use maple tree register cache
>   mfd: rc5t583: convert to use maple tree register cache

If all of this is true, is there any reason to keep REGCACHE_RBTREE
around?  If not, perhaps REGCACHE_RBTREE should be treated as
REGCACHE_MAPLE in the regmap core code first, followed by a single
tree-wide patch to replace REGCACHE_RBTREE?

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds