linux-kernel - [PATCH 2/2] tty: serial: sc16is7xx: convert to use maple tree register cache

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Date: Mon, 18 Mar 2024 14:42:16 +0800
From: wangkaiyuan <wangkaiyuan@...pur.com>
To: <gregkh@...uxfoundation.org>, <jirislaby@...nel.org>,
	<hvilleneuve@...onoff.com>, <andriy.shevchenko@...ux.intel.com>
CC: <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
	wangkaiyuan <wangkaiyuan@...pur.com>
Subject: [PATCH 2/2] tty: serial: sc16is7xx: convert to use maple tree register cache

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: wangkaiyuan <wangkaiyuan@...pur.com>
---
 drivers/tty/serial/sc16is7xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 929206a9a6e1..410b772cdbb3 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1696,7 +1696,7 @@ static struct regmap_config regcfg = {
 	.reg_bits = 5,
 	.pad_bits = 3,
 	.val_bits = 8,
-	.cache_type = REGCACHE_RBTREE,
+	.cache_type = REGCACHE_MAPLE,
 	.volatile_reg = sc16is7xx_regmap_volatile,
 	.precious_reg = sc16is7xx_regmap_precious,
 	.writeable_noinc_reg = sc16is7xx_regmap_noinc,
-- 
2.27.0