8ab0c91bbb
Changes in 4.9.285 ocfs2: drop acl cache for directories too usb: gadget: r8a66597: fix a loop in set_feature() usb: musb: tusb6010: uninitialized data in tusb_fifo_write_unaligned() cifs: fix incorrect check for null pointer in header_assemble xen/x86: fix PV trap handling on secondary processors usb-storage: Add quirk for ScanLogic SL11R-IDE older than 2.6c USB: serial: cp210x: add ID for GW Instek GDM-834x Digital Multimeter staging: greybus: uart: fix tty use after free USB: serial: mos7840: remove duplicated 0xac24 device ID USB: serial: option: add Telit LN920 compositions USB: serial: option: remove duplicate USB device ID USB: serial: option: add device id for Foxconn T99W265 mcb: fix error handling in mcb_alloc_bus() serial: mvebu-uart: fix driver's tx_empty callback net: hso: fix muxed tty registration net/mlx4_en: Don't allow aRFS for encapsulated packets scsi: iscsi: Adjust iface sysfs attr detection blktrace: Fix uaf in blk_trace access after removing by sysfs net: stmmac: allow CSR clock of 300MHz m68k: Double cast io functions to unsigned long compiler.h: Introduce absolute_pointer macro net: i825xx: Use absolute_pointer for memcpy from fixed memory location sparc: avoid stringop-overread errors qnx4: avoid stringop-overread errors parisc: Use absolute_pointer() to define PAGE0 arm64: Mark __stack_chk_guard as __ro_after_init alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile net: 6pack: Fix tx timeout and slot time spi: Fix tegra20 build with CONFIG_PM=n arm64: dts: marvell: armada-37xx: Extend PCIe MEM space qnx4: work around gcc false positive warning bug tty: Fix out-of-bound vmalloc access in imageblit cpufreq: schedutil: Use kobject release() method to free sugov_tunables cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory mac80211: fix use-after-free in CCMP/GCMP RX ipvs: check that ip_vs_conn_tab_bits is between 8 and 20 mac80211: limit injected vht mcs/nss in ieee80211_parse_tx_radiotap hwmon: (tmp421) fix rounding for negative values e100: fix length calculation in e100_get_regs_len e100: fix buffer overrun in e100_get_regs ipack: ipoctal: fix stack information leak ipack: ipoctal: fix tty registration race ipack: ipoctal: fix tty-registration error handling ipack: ipoctal: fix missing allocation-failure check ipack: ipoctal: fix module reference leak ext4: fix potential infinite loop in ext4_dx_readdir() net: udp: annotate data race around udp_sk(sk)->corkflag EDAC/synopsys: Fix wrong value type assignment for edac_mode ARM: 9077/1: PLT: Move struct plt_entries definition to header ARM: 9078/1: Add warn suppress parameter to arm_gen_branch_link() ARM: 9079/1: ftrace: Add MODULE_PLTS support ARM: 9098/1: ftrace: MODULE_PLT: Fix build problem without DYNAMIC_FTRACE arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55 HID: betop: fix slab-out-of-bounds Write in betop_probe netfilter: ipset: Fix oversized kvmalloc() calls HID: usbhid: free raw_report buffers in usbhid_stop cred: allow get_cred() and put_cred() to be given NULL. Linux 4.9.285 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I55fa39c89ba10e7092db6001c6feee0d792a401f
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* Abstract code for CPUFreq governor tunable sysfs attributes.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "cpufreq_governor.h"
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static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj)
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{
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return container_of(kobj, struct gov_attr_set, kobj);
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}
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static inline struct governor_attr *to_gov_attr(struct attribute *attr)
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{
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return container_of(attr, struct governor_attr, attr);
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}
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static ssize_t governor_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct governor_attr *gattr = to_gov_attr(attr);
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return gattr->show(to_gov_attr_set(kobj), buf);
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}
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static ssize_t governor_store(struct kobject *kobj, struct attribute *attr,
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const char *buf, size_t count)
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{
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struct gov_attr_set *attr_set = to_gov_attr_set(kobj);
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struct governor_attr *gattr = to_gov_attr(attr);
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int ret;
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mutex_lock(&attr_set->update_lock);
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ret = attr_set->usage_count ? gattr->store(attr_set, buf, count) : -EBUSY;
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mutex_unlock(&attr_set->update_lock);
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return ret;
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}
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const struct sysfs_ops governor_sysfs_ops = {
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.show = governor_show,
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.store = governor_store,
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};
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EXPORT_SYMBOL_GPL(governor_sysfs_ops);
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void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node)
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{
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INIT_LIST_HEAD(&attr_set->policy_list);
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mutex_init(&attr_set->update_lock);
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attr_set->usage_count = 1;
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list_add(list_node, &attr_set->policy_list);
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}
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EXPORT_SYMBOL_GPL(gov_attr_set_init);
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void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node)
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{
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mutex_lock(&attr_set->update_lock);
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attr_set->usage_count++;
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list_add(list_node, &attr_set->policy_list);
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mutex_unlock(&attr_set->update_lock);
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}
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EXPORT_SYMBOL_GPL(gov_attr_set_get);
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unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node)
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{
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unsigned int count;
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mutex_lock(&attr_set->update_lock);
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list_del(list_node);
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count = --attr_set->usage_count;
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mutex_unlock(&attr_set->update_lock);
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if (count)
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return count;
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mutex_destroy(&attr_set->update_lock);
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kobject_put(&attr_set->kobj);
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return 0;
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}
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EXPORT_SYMBOL_GPL(gov_attr_set_put);
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