ACPI / button: remove pointer to old lid_sysfs on unbind
[cascardo/linux.git] / drivers / staging / lustre / lnet / libcfs / linux / linux-prim.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #define DEBUG_SUBSYSTEM S_LNET
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/fs_struct.h>
41 #include <linux/sched.h>
42
43 #include "../../../include/linux/libcfs/libcfs.h"
44
45 #if defined(CONFIG_KGDB)
46 #include <linux/kgdb.h>
47 #endif
48
49 sigset_t
50 cfs_block_allsigs(void)
51 {
52         unsigned long     flags;
53         sigset_t        old;
54
55         spin_lock_irqsave(&current->sighand->siglock, flags);
56         old = current->blocked;
57         sigfillset(&current->blocked);
58         recalc_sigpending();
59         spin_unlock_irqrestore(&current->sighand->siglock, flags);
60
61         return old;
62 }
63 EXPORT_SYMBOL(cfs_block_allsigs);
64
65 sigset_t cfs_block_sigs(unsigned long sigs)
66 {
67         unsigned long  flags;
68         sigset_t        old;
69
70         spin_lock_irqsave(&current->sighand->siglock, flags);
71         old = current->blocked;
72         sigaddsetmask(&current->blocked, sigs);
73         recalc_sigpending();
74         spin_unlock_irqrestore(&current->sighand->siglock, flags);
75         return old;
76 }
77 EXPORT_SYMBOL(cfs_block_sigs);
78
79 /* Block all signals except for the @sigs */
80 sigset_t cfs_block_sigsinv(unsigned long sigs)
81 {
82         unsigned long flags;
83         sigset_t old;
84
85         spin_lock_irqsave(&current->sighand->siglock, flags);
86         old = current->blocked;
87         sigaddsetmask(&current->blocked, ~sigs);
88         recalc_sigpending();
89         spin_unlock_irqrestore(&current->sighand->siglock, flags);
90
91         return old;
92 }
93 EXPORT_SYMBOL(cfs_block_sigsinv);
94
95 void
96 cfs_restore_sigs(sigset_t old)
97 {
98         unsigned long  flags;
99
100         spin_lock_irqsave(&current->sighand->siglock, flags);
101         current->blocked = old;
102         recalc_sigpending();
103         spin_unlock_irqrestore(&current->sighand->siglock, flags);
104 }
105 EXPORT_SYMBOL(cfs_restore_sigs);
106
107 void
108 cfs_clear_sigpending(void)
109 {
110         unsigned long flags;
111
112         spin_lock_irqsave(&current->sighand->siglock, flags);
113         clear_tsk_thread_flag(current, TIF_SIGPENDING);
114         spin_unlock_irqrestore(&current->sighand->siglock, flags);
115 }
116 EXPORT_SYMBOL(cfs_clear_sigpending);