/* Copyright (C) 2006-2017  B.A.T.M.A.N. contributors:
 *
 * Simon Wunderlich, Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include "hash.h"
#include "main.h"

#include <linux/fs.h>
#include <linux/lockdep.h>
#include <linux/slab.h>

/* clears the hash */
static void batadv_hash_init(struct batadv_hashtable *hash)
{
	u32 i;

	for (i = 0; i < hash->size; i++) {
		INIT_HLIST_HEAD(&hash->table[i]);
		spin_lock_init(&hash->list_locks[i]);
	}
}

/* free only the hashtable and the hash itself. */
void batadv_hash_destroy(struct batadv_hashtable *hash)
{
	kfree(hash->list_locks);
	kfree(hash->table);
	kfree(hash);
}

/* allocates and clears the hash */
struct batadv_hashtable *batadv_hash_new(u32 size)
{
	struct batadv_hashtable *hash;

	hash = kmalloc(sizeof(*hash), GFP_ATOMIC);
	if (!hash)
		return NULL;

	hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC);
	if (!hash->table)
		goto free_hash;

	hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks),
					 GFP_ATOMIC);
	if (!hash->list_locks)
		goto free_table;

	hash->size = size;
	batadv_hash_init(hash);
	return hash;

free_table:
	kfree(hash->table);
free_hash:
	kfree(hash);
	return NULL;
}

void batadv_hash_set_lock_class(struct batadv_hashtable *hash,
				struct lock_class_key *key)
{
	u32 i;

	for (i = 0; i < hash->size; i++)
		lockdep_set_class(&hash->list_locks[i], key);
}
s='active' href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/clock'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=99421c1cb27fb837e93b517036fab4500fe39de5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=99421c1cb27fb837e93b517036fab4500fe39de5'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?id=99421c1cb27fb837e93b517036fab4500fe39de5'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>clock</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='99421c1cb27fb837e93b517036fab4500fe39de5'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>99421c1cb27fb837e93b517036fab4500fe39de5</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=99421c1cb27fb837e93b517036fab4500fe39de5'>de5fc5bacb671223f389793ad643cebe520bc292</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5'>include/dt-bindings/clock</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=c92816275674c1491ce228ee49aa030a5fa1be04'>c92816275674c1491ce228ee49aa030a5fa1be04</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=c92816275674c1491ce228ee49aa030a5fa1be04'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/clock?id=93362fa47fe98b62e4a34ab408c4a418432e7939'>93362fa47fe98b62e4a34ab408c4a418432e7939</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/clock?id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=93362fa47fe98b62e4a34ab408c4a418432e7939'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace</div><div class='commit-msg'>Pull namespace fixes from Eric Biederman:
 "This tree contains 4 fixes.

  The first is a fix for a race that can causes oopses under the right
  circumstances, and that someone just recently encountered.

  Past that are several small trivial correct fixes. A real issue that
  was blocking development of an out of tree driver, but does not appear
  to have caused any actual problems for in-tree code. A potential
  deadlock that was reported by lockdep. And a deadlock people have
  experienced and took the time to track down caused by a cleanup that
  removed the code to drop a reference count"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  sysctl: Drop reference added by grab_header in proc_sys_readdir
  pid: fix lockdep deadlock warning due to ucount_lock
  libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
  mnt: Protect the mountpoint hashtable with mount_lock
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=99421c1cb27fb837e93b517036fab4500fe39de5'>Diffstat</a> (limited to 'include/dt-bindings/clock')</div><table summary='diffstat' class='diffstat'>