Currently the kernel uses open code in multiple places to check if a task is in the root PID namespace with the kind of format:
if (task_active_pid_ns(current) == &init_pid_ns) do_something();
This patch creates a new helper function, task_is_in_init_pid_ns(), it returns true if a passed task is in the root PID namespace, otherwise returns false. So it will be used to replace open codes.
Suggested-by: Suzuki K Poulose suzuki.poulose@arm.com Signed-off-by: Leo Yan leo.yan@linaro.org --- include/linux/pid_namespace.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 7c7e627503d2..07481bb87d4e 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -86,4 +86,9 @@ extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); void pidhash_init(void); void pid_idr_init(void);
+static inline bool task_is_in_init_pid_ns(struct task_struct *tsk) +{ + return task_active_pid_ns(tsk) == &init_pid_ns; +} + #endif /* _LINUX_PID_NS_H */