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Revision 85a64889492b45f931ddac87ec09d84aa7347ee1 authored by Jonathan Lallinger on 29 September 2011, 07:58:41 UTC, committed by David S. Miller on 29 September 2011, 18:57:19 UTC 
RDSRDMA: Fix cleanup of rds_iw_mr_pool
 
In the rds_iw_mr_pool struct the free_pinned field keeps track of
memory pinned by free MRs. While this field is incremented properly
upon allocation, it is never decremented upon unmapping. This would
cause the rds_rdma module to crash the kernel upon unloading, by
triggering the BUG_ON in the rds_iw_destroy_mr_pool function.

This change keeps track of the MRs that become unpinned, so that
free_pinned can be decremented appropriately.

Signed-off-by: Jonathan Lallinger <jonathan@ogc.us>
Signed-off-by: Steve Wise <swise@ogc.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 605b91c
Raw File
dcbevent.c 
/*
 * Copyright (c) 2010, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * Author: John Fastabend <john.r.fastabend@intel.com>
 */

#include <linux/rtnetlink.h>
#include <linux/notifier.h>

static ATOMIC_NOTIFIER_HEAD(dcbevent_notif_chain);

int register_dcbevent_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_register(&dcbevent_notif_chain, nb);
}
EXPORT_SYMBOL(register_dcbevent_notifier);

int unregister_dcbevent_notifier(struct notifier_block *nb)
{
	return atomic_notifier_chain_unregister(&dcbevent_notif_chain, nb);
}
EXPORT_SYMBOL(unregister_dcbevent_notifier);

int call_dcbevent_notifiers(unsigned long val, void *v)
{
	return atomic_notifier_call_chain(&dcbevent_notif_chain, val, v);
}
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