[PATCH v1 0/7] pid: Introduce helper task_is_in_root_ns()

Leo Yan
2021-12-05T14:53:08Z

The kernel uses open code to check if a process is in root PID namespace
or not in several places.

Suggested by Suzuki, this patch set is to create a helper function
task_is_in_root_ns() so we can use it replace open code.

To test this patch set, I built Arm64 kernel with enabling all relevant
modules, and verified the kernel with CoreSight module on Arm64 Juno
board.

Leo Yan (7):
pid: Introduce helper task_is_in_root_ns()
coresight: etm3x: Use task_is_in_root_ns() to check PID namespace
coresight: etm4x: Use task_is_in_root_ns() to check PID namespace
connector/cn_proc: Use task_is_in_root_ns() to check PID namespace
coda: Use task_is_in_root_ns()
audit: Use task_is_in_root_ns()
taskstats: Use task_is_in_root_ns()

drivers/connector/cn_proc.c | 2 +-
drivers/hwtracing/coresight/coresight-etm3x-sysfs.c | 8 ++++----
drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 8 ++++----
fs/coda/inode.c | 2 +-
fs/coda/psdev.c | 2 +-
include/linux/pid_namespace.h | 5 +++++
kernel/audit.c | 2 +-
kernel/taskstats.c | 2 +-
8 files changed, 18 insertions(+), 13 deletions(-)