From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- drivers/pinctrl/pinctrl-utils.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-utils.h (limited to 'drivers/pinctrl/pinctrl-utils.h') diff --git a/drivers/pinctrl/pinctrl-utils.h b/drivers/pinctrl/pinctrl-utils.h new file mode 100644 index 000000000..203fba257 --- /dev/null +++ b/drivers/pinctrl/pinctrl-utils.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Utils functions to implement the pincontrol driver. + * + * Copyright (c) 2013, NVIDIA Corporation. + * + * Author: Laxman Dewangan + */ +#ifndef __PINCTRL_UTILS_H__ +#define __PINCTRL_UTILS_H__ + +#include + +struct pinctrl_dev; +struct pinctrl_map; + +int pinctrl_utils_reserve_map(struct pinctrl_dev *pctldev, + struct pinctrl_map **map, unsigned int *reserved_maps, + unsigned int *num_maps, unsigned int reserve); +int pinctrl_utils_add_map_mux(struct pinctrl_dev *pctldev, + struct pinctrl_map **map, unsigned int *reserved_maps, + unsigned int *num_maps, const char *group, + const char *function); +int pinctrl_utils_add_map_configs(struct pinctrl_dev *pctldev, + struct pinctrl_map **map, unsigned int *reserved_maps, + unsigned int *num_maps, const char *group, + unsigned long *configs, unsigned int num_configs, + enum pinctrl_map_type type); +int pinctrl_utils_add_config(struct pinctrl_dev *pctldev, + unsigned long **configs, unsigned int *num_configs, + unsigned long config); +void pinctrl_utils_free_map(struct pinctrl_dev *pctldev, + struct pinctrl_map *map, unsigned int num_maps); + +#endif /* __PINCTRL_UTILS_H__ */ -- cgit v1.3.1