net: introduce res_counter_charge_nofail() for socket allocations
[linux-2.6.git] / include / linux / res_counter.h
index d06d014..da81af0 100644 (file)
@@ -109,12 +109,18 @@ void res_counter_init(struct res_counter *counter, struct res_counter *parent);
  *
  * returns 0 on success and <0 if the counter->usage will exceed the
  * counter->limit _locked call expects the counter->lock to be taken
+ *
+ * charge_nofail works the same, except that it charges the resource
+ * counter unconditionally, and returns < 0 if the after the current
+ * charge we are over limit.
  */
 
 int __must_check res_counter_charge_locked(struct res_counter *counter,
                unsigned long val);
 int __must_check res_counter_charge(struct res_counter *counter,
                unsigned long val, struct res_counter **limit_fail_at);
+int __must_check res_counter_charge_nofail(struct res_counter *counter,
+               unsigned long val, struct res_counter **limit_fail_at);
 
 /*
  * uncharge - tell that some portion of the resource is released