linux-kernel - Re: [PATCH 4/4] iio: accel: kx022a: convert to use maple tree register cache

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Message-ID: <af91db5d-b115-4577-83b4-0394b60895c3@gmail.com>
Date: Fri, 14 Feb 2025 08:36:12 +0200
From: Matti Vaittinen <mazziesaccount@...il.com>
To: Bo Liu <liubo03@...pur.com>, dan@...obertson.com, jic23@...nel.org
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] iio: accel: kx022a: convert to use maple tree
 register cache

On 12/02/2025 09:52, Bo Liu 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
> more appropriate for modern systems than those made by the rbtree cache.
> 
> Signed-off-by: Bo Liu <liubo03@...pur.com>

Acked-by: Matti Vaittinen <mazziesaccount@...il.com>

> ---
>   drivers/iio/accel/kionix-kx022a.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/accel/kionix-kx022a.c b/drivers/iio/accel/kionix-kx022a.c
> index 5aeb3b951ac5..3a56ab00791a 100644
> --- a/drivers/iio/accel/kionix-kx022a.c
> +++ b/drivers/iio/accel/kionix-kx022a.c
> @@ -149,7 +149,7 @@ static const struct regmap_config kx022a_regmap_config = {
>   	.rd_noinc_table = &kx022a_nir_regs,
>   	.precious_table = &kx022a_precious_regs,
>   	.max_register = KX022A_MAX_REGISTER,
> -	.cache_type = REGCACHE_RBTREE,
> +	.cache_type = REGCACHE_MAPLE,
>   };
>   
>   /* Regmap configs kx132 */
> @@ -260,7 +260,7 @@ static const struct regmap_config kx132_regmap_config = {
>   	.rd_noinc_table = &kx132_nir_regs,
>   	.precious_table = &kx132_precious_regs,
>   	.max_register = KX132_MAX_REGISTER,
> -	.cache_type = REGCACHE_RBTREE,
> +	.cache_type = REGCACHE_MAPLE,
>   };
>   
>   struct kx022a_data {