[PATCH v2 3/7] coresight: etm4x: Use task_is_in_init_pid_ns()
From: Leo Yan <hidden>
Date: 2021-12-08 08:33:40
Also in:
linux-arm-kernel, lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
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 <redacted> --- 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) != &init_pid_ns) + if (!task_is_in_init_pid_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_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) != &init_pid_ns) + if (!task_is_in_init_pid_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_init_pid_ns(current)) return -EINVAL; /*
--
2.25.1