attr_current_value_store(9)

💖 NAME 💖

okay bestie, meet attr_current_value_store(9) from the Kernel API Manual — its whole job is setting the current value of the attribute you point it at. iconic behavior, honestly 💅

✨ SYNOPSIS ✨

ssize_t attr_current_value_store (struct kobject *kobj , struct
       kobj_attribute *kattr , const char *buf , size_t count , struct
       tunable_attr_01 *tunable_attr );

🎀 ARGUMENTS 🎀

• kobj — pointer to the driver object. main character pointer energy ✨
• kattr — pointer to the attribute that's calling this function. it's giving self-awareness 🪞
• buf — the buffer we read from; it gets parsed to int type. numbers go in, numbers come out 🔢
• count — required by the sysfs attribute macros; you pass it in from the callee attr. mandatory lil paperwork 📋
• tunable_attr — the attribute that's actually being stored. the one we're setting, periodt 💖

🌸 DESCRIPTION 🌸

Okay so here's the vibe: this function sets the value of the given attribute, but only when you're operating under the "custom" smartfan profile. custom only, bestie 🌈

The current smartfan profile gets retrieved from the lenovo-wmi-gamezone driver, and if the result is not "custom", an error is returned. no custom profile, no storing 😭

It's designed to be generic on purpose, so it can be called from any integer attribute's "_store" function. reusable king 👑 The integer that's headed to the WMI method gets range checked, and if it's out of range, an error code is returned. stay in your lane, number 🚧

And if the value is valid and WMI is a success? Then the sysfs attribute is notified. slay, notification delivered 🎀

💅 RETURN 💅

Either count, or an error code. simple, clean, no cap ✨

🌈 SEE ALSO 🌈

Kernel file: ./drivers/platform/x86/lenovo/wmi-other.c go read it, iykyk 💙

• lwmi_om_fan_get_set(9)
• lwmi_om_hwmon_is_visible(9)
• lwmi_om_hwmon_read(9)
• lwmi_om_hwmon_write(9)
• lwmi_om_hwmon_add(9)
• lwmi_om_hwmon_remove(9)
• lwmi_om_fan_info_init(9)
• lwmi_om_fan_info_collect_cd00(9)
• lwmi_om_fan_info_collect_cd_fan(9)
• lwmi_psy_ext_get_prop(9)
• lwmi_psy_ext_set_prop(9)
• lwmi_psy_prop_is_supported(9)
• lwmi_psy_prop_is_writeable(9)
• lwmi_add_battery(9)
• lwmi_remove_battery(9)
• lwmi_acpi_match(9)
• lwmi_om_psy_ext_init(9)
• lwmi_om_psy_remove(9)
• tunable_attr_01_id(9)
• int_type_show(9)
• attr_capdata01_show(9)
• attr_current_value_show(9)
• lwmi_attr_01_is_supported(9)
• lwmi_om_fw_attr_add(9)
• lwmi_om_fw_attr_remove(9)
• lwmi_om_master_bind(9)
• lwmi_om_master_unbind(9)

byeee 🫶 this page comes from ./drivers/platform/x86/lenovo, dated October 2026, and yes the title stays attr_current_value_store(9) ✨