tracing: Remove NULL check from current in tracing_generic_entry_update().

I can't imagine when or why `current' would return a NULL pointer. This
check was added in commit
      72829bc3d63cd ("ftrace: move enums to ftrace.h and make helper function global")

but it doesn't give me hint why it was needed.

Assume `current' never returns a NULL pointer and remove the check.

Link: https://lkml.kernel.org/r/20210125194511.3924915-5-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index 67ae708..5d1eeac 100644 (file)
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -152,10 +152,8 @@ static inline void tracing_generic_entry_update(struct trace_entry *entry,
                                                unsigned short type,
                                                unsigned int trace_ctx)
 {
-       struct task_struct *tsk = current;
-
        entry->preempt_count            = trace_ctx & 0xff;
-       entry->pid                      = (tsk) ? tsk->pid : 0;
+       entry->pid                      = current->pid;
        entry->type                     = type;
        entry->flags =                  trace_ctx >> 16;
 }