coresight: Remove function coresight_vpid_to_pid()

Now that we prevent users from using contextID tracing when PID namespaces
are involved there is no client for function coresight_vpid_to_pid().  As
such simply remove it.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Kim Phillips <kim.phillips@arm.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index c265e04..e5421b8 100644 (file)
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -267,24 +267,4 @@ static inline struct coresight_platform_data *of_get_coresight_platform_data(
        struct device *dev, const struct device_node *node) { return NULL; }
 #endif
 
-#ifdef CONFIG_PID_NS
-static inline unsigned long
-coresight_vpid_to_pid(unsigned long vpid)
-{
-       struct task_struct *task = NULL;
-       unsigned long pid = 0;
-
-       rcu_read_lock();
-       task = find_task_by_vpid(vpid);
-       if (task)
-               pid = task_pid_nr(task);
-       rcu_read_unlock();
-
-       return pid;
-}
-#else
-static inline unsigned long
-coresight_vpid_to_pid(unsigned long vpid) { return vpid; }
-#endif
-
 #endif