1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31 #ifndef _LINUX_COMPAT_H_
32 #define _LINUX_COMPAT_H_
33
34 #include <sys/param.h>
35 #include <sys/proc.h>
36 #include <sys/malloc.h>
37
38 struct thread;
39 struct task_struct;
40
41 extern int linux_alloc_current(struct thread *, int flags);
42 extern void linux_free_current(struct task_struct *);
43
44 static inline void
linux_set_current(struct thread * td)45 linux_set_current(struct thread *td)
46 {
47 if (__predict_false(td->td_lkpi_task == NULL))
48 linux_alloc_current(td, M_WAITOK);
49 }
50
51 static inline int
linux_set_current_flags(struct thread * td,int flags)52 linux_set_current_flags(struct thread *td, int flags)
53 {
54 if (__predict_false(td->td_lkpi_task == NULL))
55 return (linux_alloc_current(td, flags));
56 return (0);
57 }
58
59 #endif /* _LINUX_COMPAT_H_ */
60