Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / include / linux / pid.h

diff --git a/include/linux/pid.h b/include/linux/pid.h
index 49f1c2f..31afb7e 100644 (file)
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -21,7 +21,7 @@ enum pid_type
  * quickly from the numeric pid value.  The attached processes may be
  * quickly accessed by following pointers from struct pid.
  *
- * Storing pid_t values in the kernel and refering to them later has a
+ * Storing pid_t values in the kernel and referring to them later has a
  * problem.  The process originally with that pid may have exited and the
  * pid allocator wrapped, and another process could have come along
  * and been assigned that pid.
@@ -140,6 +140,17 @@ static inline struct pid_namespace *ns_of_pid(struct pid *pid)
        return ns;
 }
 
+/*
+ * is_child_reaper returns true if the pid is the init process
+ * of the current namespace. As this one could be checked before
+ * pid_ns->child_reaper is assigned in copy_process, we check
+ * with the pid number.
+ */
+static inline bool is_child_reaper(struct pid *pid)
+{
+       return pid->numbers[pid->level].nr == 1;
+}
+
 /*
  * the helpers to get the pid's id seen from different namespaces
  *