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    Subject[PATCH v1 3/7] coresight: etm4x: Use task_is_in_root_ns() to check PID namespace
    Date
    To avoid open code, this patch uses the helper task_is_in_root_ns() to
    check if a task is in root PID namespace.

    Signed-off-by: Leo Yan <leo.yan@linaro.org>
    ---
    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..cd87ad8456d7 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) != &init_pid_ns)
    + if (!task_is_in_root_ns(current))
    return -EINVAL;

    spin_lock(&drvdata->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) != &init_pid_ns)
    + if (!task_is_in_root_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) != &init_pid_ns)
    + if (!task_is_in_root_ns(current))
    return -EINVAL;

    spin_lock(&drvdata->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) != &init_pid_ns)
    + if (!task_is_in_root_ns(current))
    return -EINVAL;

    /*
    --
    2.25.1
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