package/mac80211/patches/900-backport_list_for_each_entry_continue_rcu.patch

   1 diff --git a/include/linux/compat-2.6.31.h b/include/linux/compat-2.6.31.h
   2 index 54ddefd..6c454cb 100644
   3 --- a/include/linux/compat-2.6.31.h
   4 +++ b/include/linux/compat-2.6.31.h
   5 @@ -191,6 +191,17 @@ void compat_synchronize_threaded_irq(struct compat_threaded_irq *comp)
   6         cancel_work_sync(&comp->work);
   7  }
   8
   9 +/**
  10 + * list_entry_rcu - get the struct for this entry
  11 + * @ptr:        the &struct list_head pointer.
  12 + * @type:       the type of the struct this is embedded in.
  13 + * @member:     the name of the list_struct within the struct.
  14 + *
  15 + * This primitive may safely run concurrently with the _rcu list-mutation
  16 + * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock().
  17 + */
  18 +#define list_entry_rcu(ptr, type, member) \
  19 +       container_of(rcu_dereference(ptr), type, member)
  20
  21  #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)) */
  22
  23 diff --git a/include/linux/compat-2.6.33.h b/include/linux/compat-2.6.33.h
  24 index e4dff72..e7e20d9 100644
  25 --- a/include/linux/compat-2.6.33.h
  26 +++ b/include/linux/compat-2.6.33.h
  27 @@ -98,6 +98,20 @@ int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
  28  #define kfifo_out(a, b, c) __kfifo_get(*a, b, c)
  29  #define kfifo_len(a) __kfifo_len(*a)
  30
  31 +/**
  32 + * list_for_each_entry_continue_rcu - continue iteration over list of given type
  33 + * @pos:       the type * to use as a loop cursor.
  34 + * @head:      the head for your list.
  35 + * @member:    the name of the list_struct within the struct.
  36 + *
  37 + * Continue to iterate over list of given type, continuing after
  38 + * the current position.
  39 + */
  40 +#define list_for_each_entry_continue_rcu(pos, head, member)            \
  41 +       for (pos = list_entry_rcu(pos->member.next, typeof(*pos), member); \
  42 +            prefetch(pos->member.next), &pos->member != (head);        \
  43 +            pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
  44 +
  45  #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)) */
  46
  47  #endif /* LINUX_26_33_COMPAT_H */