/*
 * Scheduler code and data structures related to cpufreq.
 *
 * Copyright (C) 2016, Intel Corporation
 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 *
 * 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);
den' name='id' value='0d4ee015d5ea50febb882d00520d62c6de3f725c'/><select name='qt'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>net</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sched?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>sched</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>cls_api.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='0d4ee015d5ea50febb882d00520d62c6de3f725c'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Jens Axboe &lt;axboe@fb.com&gt;</td><td class='right'>2017-01-26 09:56:15 -0700</td></tr>
<tr><th>committer</th><td>Jens Axboe &lt;axboe@fb.com&gt;</td><td class='right'>2017-01-26 09:56:15 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>0d4ee015d5ea50febb882d00520d62c6de3f725c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>6bd2e032e00c34590a8d39d5a43b6a7518d1384d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>net/sched/cls_api.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/cls_api.c?id=690e5325b8c7d5db05fc569c0f7b888bb4248272'>690e5325b8c7d5db05fc569c0f7b888bb4248272</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c&amp;id2=690e5325b8c7d5db05fc569c0f7b888bb4248272'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/cls_api.c?id=19e420bb4076ace670addc55300e3b8c4a02dfc6'>19e420bb4076ace670addc55300e3b8c4a02dfc6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched/cls_api.c?id=0d4ee015d5ea50febb882d00520d62c6de3f725c&amp;id2=19e420bb4076ace670addc55300e3b8c4a02dfc6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'nvme-4.10-fixes' of git://git.infradead.org/nvme into for-linus</div><div class='commit-msg'>Pull nvme target fixes from Sagi:

Given that its -rc6, I removed anything that is not
bug fix.

- nvmet-fc discard fix from Christoph
- queue disconnect fix from James
- nvmet-rdma dma sync fix from Parav
- Some more nvmet fixes
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=0d4ee015d5ea50febb882d00520d62c6de3f725c'>Diffstat</a> (limited to 'net/sched/cls_api.c')</div><table summary='diffstat' class='diffstat'>