[PATCH v1 2/7] coresight: etm3x: Use task_is_in_root_ns() to check PID namespace
Leo Yan
leo.yan at linaro.org
Sun Dec 5 06:51:00 PST 2021
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 at 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);
--
2.25.1
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