#ifndef LLC_S_AC_H #define LLC_S_AC_H /* * Copyright (c) 1997 by Procom Technology,Inc. * 2001 by Arnaldo Carvalho de Melo * * This program can be redistributed or modified under the terms of the * GNU General Public License as published by the Free Software Foundation. * This program is distributed without any warranty or implied warranty * of merchantability or fitness for a particular purpose. * * See the GNU General Public License for more details. */ /* SAP component actions */ #define SAP_ACT_UNITDATA_IND 1 #define SAP_ACT_SEND_UI 2 #define SAP_ACT_SEND_XID_C 3 #define SAP_ACT_SEND_XID_R 4 #define SAP_ACT_SEND_TEST_C 5 #define SAP_ACT_SEND_TEST_R 6 #define SAP_ACT_REPORT_STATUS 7 #define SAP_ACT_XID_IND 8 #define SAP_ACT_TEST_IND 9 /* All action functions must look like this */ typedef int (*llc_sap_action_t)(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_unitdata_ind(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_send_ui(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_send_xid_c(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_send_xid_r(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_send_test_c(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_send_test_r(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_report_status(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_xid_ind(struct llc_sap *sap, struct sk_buff *skb); int llc_sap_action_test_ind(struct llc_sap *sap, struct sk_buff *skb); #endif /* LLC_S_AC_H */ i/linux/net-next.git/?h=nds-private-remove'>summaryrefslogtreecommitdiff
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authorAndrei Vagin <avagin@openvz.org>2017-01-04 19:28:14 -0800
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:56 +1300
commitadd7c65ca426b7a37184dd3d2172394e23d585d6 (patch)
tree28b08b519540041b06ed0ab0b1c005076b932e8e /net/sched/act_ife.c
parent75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net/sched/act_ife.c')