rcupdate.h

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (c) 2016-2017 Mellanox Technologies, Ltd.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 #ifndef _LINUXKPI_LINUX_RCUPDATE_H_
   29 #define _LINUXKPI_LINUX_RCUPDATE_H_
   30 
   31 #include <linux/compiler.h>
   32 #include <linux/types.h>
   33 
   34 #include <machine/atomic.h>
   35 
   36 #define LINUX_KFREE_RCU_OFFSET_MAX      4096    /* exclusive */
   37 
   38 /* BSD specific defines */
   39 #define RCU_TYPE_REGULAR 0
   40 #define RCU_TYPE_SLEEPABLE 1
   41 #define RCU_TYPE_MAX 2
   42 
   43 #define RCU_INITIALIZER(v)                      \
   44         ((__typeof(*(v)) *)(v))
   45 
   46 #define RCU_INIT_POINTER(p, v) do {             \
   47         (p) = (v);                              \
   48 } while (0)
   49 
   50 #define call_rcu(ptr, func) do {                \
   51         linux_call_rcu(RCU_TYPE_REGULAR, ptr, func);    \
   52 } while (0)
   53 
   54 #define rcu_barrier(void) do {                  \
   55         linux_rcu_barrier(RCU_TYPE_REGULAR);    \
   56 } while (0)
   57 
   58 #define rcu_read_lock(void) do {                \
   59         linux_rcu_read_lock(RCU_TYPE_REGULAR);  \
   60 } while (0)
   61 
   62 #define rcu_read_unlock(void) do {              \
   63         linux_rcu_read_unlock(RCU_TYPE_REGULAR);\
   64 } while (0)
   65 
   66 #define synchronize_rcu(void) do {      \
   67         linux_synchronize_rcu(RCU_TYPE_REGULAR);        \
   68 } while (0)
   69 
   70 #define synchronize_rcu_expedited(void) do {    \
   71         linux_synchronize_rcu(RCU_TYPE_REGULAR);        \
   72 } while (0)
   73 
   74 #define kfree_rcu(ptr, rcu_head) do {                           \
   75         CTASSERT(offsetof(__typeof(*(ptr)), rcu_head) <         \
   76             LINUX_KFREE_RCU_OFFSET_MAX);                        \
   77         call_rcu(&(ptr)->rcu_head, (rcu_callback_t)(uintptr_t)  \
   78             offsetof(__typeof(*(ptr)), rcu_head));              \
   79 } while (0)
   80 
   81 #define rcu_access_pointer(p)                   \
   82         ((__typeof(*p) *)READ_ONCE(p))
   83 
   84 #define rcu_dereference_protected(p, c)         \
   85         ((__typeof(*p) *)READ_ONCE(p))
   86 
   87 #define rcu_dereference(p)                      \
   88         rcu_dereference_protected(p, 0)
   89 
   90 #define rcu_dereference_check(p, c)             \
   91         rcu_dereference_protected(p, c)
   92 
   93 #define rcu_dereference_raw(p)                  \
   94         ((__typeof(*p) *)READ_ONCE(p))
   95 
   96 #define rcu_pointer_handoff(p) (p)
   97 
   98 #define rcu_assign_pointer(p, v) do {                           \
   99         atomic_store_rel_ptr((volatile uintptr_t *)&(p),        \
  100             (uintptr_t)(v));                                    \
  101 } while (0)
  102 
  103 #define rcu_replace_pointer(rcu, ptr, c)                        \
  104 ({                                                              \
  105         typeof(ptr) __tmp = rcu_dereference_protected(rcu, c);  \
  106         rcu_assign_pointer(rcu, ptr);                           \
  107         __tmp;                                                  \
  108 })
  109 
  110 #define rcu_swap_protected(rcu, ptr, c) do {                    \
  111         typeof(ptr) p = rcu_dereference_protected(rcu, c);      \
  112         rcu_assign_pointer(rcu, ptr);                           \
  113         (ptr) = p;                                              \
  114 } while (0)
  115 
  116 /* prototypes */
  117 
  118 extern void linux_call_rcu(unsigned type, struct rcu_head *ptr, rcu_callback_t func);
  119 extern void linux_rcu_barrier(unsigned type);
  120 extern void linux_rcu_read_lock(unsigned type);
  121 extern void linux_rcu_read_unlock(unsigned type);
  122 extern void linux_synchronize_rcu(unsigned type);
  123 
  124 /* Empty implementation for !DEBUG */
  125 #define init_rcu_head(...)
  126 #define destroy_rcu_head(...)
  127 #define init_rcu_head_on_stack(...)
  128 #define destroy_rcu_head_on_stack(...)
  129 
  130 #endif                                  /* _LINUXKPI_LINUX_RCUPDATE_H_ */

Cache object: 5d8144a24fb2d87c5cc624913e31f6e1

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/rcupdate.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/rcupdate.h