On Wed, Dec 08, 2021 at 04:33:16PM +0800, Leo Yan wrote:
> This patch replaces open code with task_is_in_init_pid_ns() to check if
> a task is in root PID namespace.
>
> Signed-off-by: Leo Yan
> ---
> drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 8
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
> b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
> index a0640fa5c55b..10ef2a29006e 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
> @@ -1890,7 +1890,7 @@ static ssize_t ctxid_pid_show(struct device *dev,
>* Don't use contextID tracing if coming from a PID namespace. See
>* comment in ctxid_pid_store().
>*/
> - if (task_active_pid_ns(current) != _pid_ns)
> + if (!task_is_in_init_pid_ns(current))
> return -EINVAL;
>
> spin_lock(>spinlock);
> @@ -1918,7 +1918,7 @@ static ssize_t ctxid_pid_store(struct device *dev,
>* As such refuse to use the feature if @current is not in the initial
>* PID namespace.
>*/
> - if (task_active_pid_ns(current) != _pid_ns)
> + if (!task_is_in_init_pid_ns(current))
> return -EINVAL;
>
> /*
> @@ -1951,7 +1951,7 @@ static ssize_t ctxid_masks_show(struct device *dev,
>* Don't use contextID tracing if coming from a PID namespace. See
>* comment in ctxid_pid_store().
>*/
> - if (task_active_pid_ns(current) != _pid_ns)
> + if (!task_is_in_init_pid_ns(current))
> return -EINVAL;
>
> spin_lock(>spinlock);
> @@ -1975,7 +1975,7 @@ static ssize_t ctxid_masks_store(struct device *dev,
>* Don't use contextID tracing if coming from a PID namespace. See
>* comment in ctxid_pid_store().
>*/
> - if (task_active_pid_ns(current) != _pid_ns)
> + if (!task_is_in_init_pid_ns(current))
> return -EINVAL;
>
> /*
Acked-by: Balbir Singh
--
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