From: Leo Yan Date: Wed, 26 Jan 2022 05:04:26 +0000 (+0800) Subject: pid: Introduce helper task_is_in_init_pid_ns() X-Git-Tag: v6.1-rc5~2124^2~11^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d7e4f8545b497b3f5687e592f1c355cbaee64c8c;p=platform%2Fkernel%2Flinux-starfive.git pid: Introduce helper task_is_in_init_pid_ns() 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 Signed-off-by: Leo Yan Reviewed-by: Leon Romanovsky Acked-by: Suzuki K Poulose Acked-by: Balbir Singh Signed-off-by: Jakub Kicinski --- diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 7c7e627..07481bb 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 */