/* * Scheduler code and data structures related to cpufreq. * * Copyright (C) 2016, Intel Corporation * Author: Rafael J. Wysocki * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include "sched.h" DEFINE_PER_CPU(struct update_util_data *, cpufreq_update_util_data); /** * cpufreq_add_update_util_hook - Populate the CPU's update_util_data pointer. * @cpu: The CPU to set the pointer for. * @data: New pointer value. * @func: Callback function to set for the CPU. * * Set and publish the update_util_data pointer for the given CPU. * * The update_util_data pointer of @cpu is set to @data and the callback * function pointer in the target struct update_util_data is set to @func. * That function will be called by cpufreq_update_util() from RCU-sched * read-side critical sections, so it must not sleep. @data will always be * passed to it as the first argument which allows the function to get to the * target update_util_data structure and its container. * * The update_util_data pointer of @cpu must be NULL when this function is * called or it will WARN() and return with no effect. */ void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data, void (*func)(struct update_util_data *data, u64 time, unsigned int flags)) { if (WARN_ON(!data || !func)) return; if (WARN_ON(per_cpu(cpufreq_update_util_data, cpu))) return; data->func = func; rcu_assign_pointer(per_cpu(cpufreq_update_util_data, cpu), data); } EXPORT_SYMBOL_GPL(cpufreq_add_update_util_hook); /** * cpufreq_remove_update_util_hook - Clear the CPU's update_util_data pointer. * @cpu: The CPU to clear the pointer for. * * Clear the update_util_data pointer for the given CPU. * * Callers must use RCU-sched callbacks to free any memory that might be * accessed via the old update_util_data pointer or invoke synchronize_sched() * right after this function to avoid use-after-free. */ void cpufreq_remove_update_util_hook(int cpu) { rcu_assign_pointer(per_cpu(cpufreq_update_util_data, cpu), NULL); } EXPORT_SYMBOL_GPL(cpufreq_remove_update_util_hook);
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authorAndrew Lunn <andrew@lunn.ch>2017-02-09 00:00:43 +0100
committerDavid S. Miller <davem@davemloft.net>2017-02-09 17:11:41 -0500
commitc0e4dadb3494bd0bf4fdeac341509deac8f4b47c (patch)
treeeacd1131375b3dfde0fa75b224a18c01008ff2fd
parent50f008e583d11b3133f23f29b05a0fcac2af3b40 (diff)
net: dsa: mv88e6xxx: Move forward declaration to where it is needed
Move it out from the middle for the #defines to just before it is needed. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/dsa/mv88e6xxx/mv88e6xxx.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx/mv88e6xxx.h