This patch uses helper task_is_in_root_ns() to replace open code for checking if a task is in root PID namespace.
Signed-off-by: Leo Yan leo.yan@linaro.org --- drivers/hwtracing/coresight/coresight-etm3x-sysfs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c index e8c7649f123e..baba16ad9bb1 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm3x-sysfs.c @@ -1030,7 +1030,7 @@ 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); @@ -1058,7 +1058,7 @@ 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;
ret = kstrtoul(buf, 16, &pid); @@ -1084,7 +1084,7 @@ static ssize_t ctxid_mask_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;
val = config->ctxid_mask; @@ -1104,7 +1104,7 @@ static ssize_t ctxid_mask_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;
ret = kstrtoul(buf, 16, &val);