This defines list_for_each_entry_rcu_notrace and list_entry_rcu_notrace
which use rcu_dereference_raw_notrace instead of rcu_dereference_raw.
This allows using list_for_each_entry_rcu_notrace in real mode (MMU is off).
Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
---
include/linux/rculist.h | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 17c6b1f..439c4d7 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -253,6 +253,25 @@ static inline void list_splice_init_rcu(struct list_head *list,
})
/**
+ * list_entry_rcu_notrace - get the struct for this entry
+ * @ptr: the &struct list_head pointer.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_struct within the struct.
+ *
+ * This primitive may safely run concurrently with the _rcu list-mutation
+ * primitives such as list_add_rcu() as long as it's guarded by rcu_read_lock().
+ *
+ * This is the same as list_entry_rcu() except that it does
+ * not do any RCU debugging or tracing.
+ */
+#define list_entry_rcu_notrace(ptr, type, member) \
+({ \
+ typeof(*ptr) __rcu *__ptr = (typeof(*ptr) __rcu __force *)ptr; \
+ container_of((typeof(ptr))rcu_dereference_raw_notrace(__ptr), \
+ type, member); \
+})
+
+/**
* Where are list_empty_rcu() and list_first_entry_rcu()?
*
* Implementing those functions following their counterparts list_empty() and
@@ -308,6 +327,25 @@ static inline void list_splice_init_rcu(struct list_head *list,
pos = list_entry_rcu(pos->member.next, typeof(*pos), member))
/**
+ * list_for_each_entry_rcu_notrace - iterate over rcu list of given type
+ * @pos: the type * to use as a loop cursor.
+ * @head: the head for your list.
+ * @member: the name of the list_struct within the struct.
+ *
+ * This list-traversal primitive may safely run concurrently with
+ * the _rcu list-mutation primitives such as list_add_rcu()
+ * as long as the traversal is guarded by rcu_read_lock().
+ *
+ * This is the same as list_for_each_entry_rcu() except that it does
+ * not do any RCU debugging or tracing.
+ */
+#define list_for_each_entry_rcu_notrace(pos, head, member) \
+ for (pos = list_entry_rcu_notrace((head)->next, typeof(*pos), member); \
+ &pos->member != (head); \
+ pos = list_entry_rcu_notrace(pos->member.next, typeof(*pos), \
+ member))
+
+/**
* list_for_each_entry_continue_rcu - continue iteration over list of given type
* @pos: the type * to use as a loop cursor.
* @head: the head for your list.
--
2.4.0.rc3.8.gfb3e7d5
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