/*
 * Preemptible hypercalls
 *
 * Copyright (C) 2014 Citrix Systems R&D ltd.
 *
 * This source code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 */

#include <linux/sched.h>
#include <xen/xen-ops.h>

#ifndef CONFIG_PREEMPT

/*
 * Some hypercalls issued by the toolstack can take many 10s of
 * seconds. Allow tasks running hypercalls via the privcmd driver to
 * be voluntarily preempted even if full kernel preemption is
 * disabled.
 *
 * Such preemptible hypercalls are bracketed by
 * xen_preemptible_hcall_begin() and xen_preemptible_hcall_end()
 * calls.
 */

DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);

asmlinkage __visible void xen_maybe_preempt_hcall(void)
{
	if (unlikely(__this_cpu_read(xen_in_preemptible_hcall)
		     && need_resched())) {
		/*
		 * Clear flag as we may be rescheduled on a different
		 * cpu.
		 */
		__this_cpu_write(xen_in_preemptible_hcall, false);
		_cond_resched();
		__this_cpu_write(xen_in_preemptible_hcall, true);
	}
}
#endif /* CONFIG_PREEMPT */
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc3?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>dwc3</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc3/gadget.h?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>gadget.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'/><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>Mark Rutland &lt;mark.rutland@arm.com&gt;</td><td class='right'>2017-01-25 19:30:09 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2017-01-25 21:05:37 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc3/gadget.h?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>1372cef1c697d8aac0cc923f8aa2c37d790ec9ed</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/dwc3/gadget.h?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc3/gadget.h?id=d00b74613fb18dfd0a5aa99270ee2e72d5c808d7'>d00b74613fb18dfd0a5aa99270ee2e72d5c808d7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/dwc3/gadget.h?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed&amp;id2=d00b74613fb18dfd0a5aa99270ee2e72d5c808d7'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: fixed: Revert support for ACPI interface</div><div class='commit-msg'>This reverts commit 13bed58ce874 (regulator: fixed: add support for ACPI
interface).

While there does appear to be a practical need to manage regulators on ACPI
systems, using ad-hoc properties to describe regulators to the kernel presents
a number of problems (especially should ACPI gain first class support for such
things), and there are ongoing discussions as to how to manage this.

Until there is a rough consensus, revert commit 13bed58ce8748d43, which hasn't
been in a released kernel yet as discussed in [1] and the surrounding thread.

[1] http://lkml.kernel.org/r/20170125184949.x2wkoo7kbaaajkjk@sirena.org.uk

Signed-off-by: Mark Rutland &lt;mark.rutland@arm.com&gt;
Cc: Liam Girdwood &lt;lgirdwood@gmail.com&gt;
Cc: Lorenzo Pieralisi &lt;lorenzo.pieralisi@arm.com&gt;
Cc: Lu Baolu &lt;baolu.lu@linux.intel.com&gt;
Cc: Mark Brown &lt;broonie@kernel.org&gt;
Cc: Rafael J. Wysocki &lt;rafael@kernel.org&gt;
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=1372cef1c697d8aac0cc923f8aa2c37d790ec9ed'>Diffstat</a> (limited to 'drivers/usb/dwc3/gadget.h')</div><table summary='diffstat' class='diffstat'>