[PATCH v2 1/7] pid: Introduce helper task_is_in_init_pid_ns()

[Leon Romanovsky]

On Wed, Dec 08, 2021 at 04:33:14PM +0800, Leo Yan wrote:
> 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 at arm.com>
> Signed-off-by: Leo Yan <leo.yan at linaro.org>
> ---
>  include/linux/pid_namespace.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro at nvidia.com>