kernel/latencytop.c: rename clear_all_latency_tracing to clear_tsk_latency_tracing

The name clear_all_latency_tracing is misleading, in fact which only
clear per task's latency_record[], and we do have another function named
clear_global_latency_tracing which clear the global latency_record[]
buffer.

Link: http://lkml.kernel.org/r/20190226114602.16902-1-linf@wangsu.com
Signed-off-by: Lin Feng <linf@wangsu.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Fabian Frederick <fabf@skynet.be>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/fork.c b/kernel/fork.c
index b409e79..b4cba95 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2093,7 +2093,7 @@ static __latent_entropy struct task_struct *copy_process(
 #ifdef TIF_SYSCALL_EMU
 	clear_tsk_thread_flag(p, TIF_SYSCALL_EMU);
 #endif
-	clear_all_latency_tracing(p);
+	clear_tsk_latency_tracing(p);
 
 	/* ok, now we should be set up.. */
 	p->pid = pid_nr(pid);