/*
 *  Do sleep inside a spin-lock
 *  Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
 *
 *
 *   This program 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.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/export.h>
#include <sound/core.h>
#include "seq_lock.h"

#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG)

/* wait until all locks are released */
void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
{
	int max_count = 5 * HZ;

	if (atomic_read(lockp) < 0) {
		pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
		return;
	}
	while (atomic_read(lockp) > 0) {
		if (max_count == 0) {
			pr_warn("ALSA: seq_lock: timeout [%d left] in %s:%d\n", atomic_read(lockp), file, line);
			break;
		}
		schedule_timeout_uninterruptible(1);
		max_count--;
	}
}

EXPORT_SYMBOL(snd_use_lock_sync_helper);

#endif
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/acpi?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>acpi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/actbl3.h?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>actbl3.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3277953de2f31dd03c6375e9a9f680ac37fc9d27'/><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>zhong jiang &lt;zhongjiang@huawei.com&gt;</td><td class='right'>2017-01-24 15:18:52 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-24 16:26:14 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/actbl3.h?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>3277953de2f31dd03c6375e9a9f680ac37fc9d27</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/acpi/actbl3.h?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>6ba22924faa1b82ef2f0277db10a3f5abdc44157</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/acpi/actbl3.h?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>include/acpi/actbl3.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/acpi/actbl3.h?id=3705ccfdd1e8b539225ce20e3925a945cc788d67'>3705ccfdd1e8b539225ce20e3925a945cc788d67</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/acpi/actbl3.h?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27&amp;id2=3705ccfdd1e8b539225ce20e3925a945cc788d67'>diff</a>)</td></tr></table>
<div class='commit-subject'>mm: do not export ioremap_page_range symbol for external module</div><div class='commit-msg'>Recently, I've found cases in which ioremap_page_range was used
incorrectly, in external modules, leading to crashes.  This can be
partly attributed to the fact that ioremap_page_range is lower-level,
with fewer protections, as compared to the other functions that an
external module would typically call.  Those include:

     ioremap_cache
     ioremap_nocache
     ioremap_prot
     ioremap_uc
     ioremap_wc
     ioremap_wt

...each of which wraps __ioremap_caller, which in turn provides a safer
way to achieve the mapping.

Therefore, stop EXPORT-ing ioremap_page_range.

Link: http://lkml.kernel.org/r/1485173220-29010-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang &lt;zhongjiang@huawei.com&gt;
Reviewed-by: John Hubbard &lt;jhubbard@nvidia.com&gt;
Suggested-by: John Hubbard &lt;jhubbard@nvidia.com&gt;
Acked-by: Michal Hocko &lt;mhocko@suse.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3277953de2f31dd03c6375e9a9f680ac37fc9d27'>Diffstat</a> (limited to 'include/acpi/actbl3.h')</div><table summary='diffstat' class='diffstat'>