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-rw-r--r--kernel/pid.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/pid.c b/kernel/pid.c
index 8132a6ddfa10..6eb14841b734 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -376,6 +376,19 @@ struct pid *find_get_pid(pid_t nr)
return pid;
}
+pid_t pid_nr_ns(struct pid *pid, struct pid_namespace *ns)
+{
+ struct upid *upid;
+ pid_t nr = 0;
+
+ if (pid && ns->level <= pid->level) {
+ upid = &pid->numbers[ns->level];
+ if (upid->ns == ns)
+ nr = upid->nr;
+ }
+ return nr;
+}
+
/*
* Used by proc to find the first pid that is greater then or equal to nr.
*