linux-kernel - [PATCH] tracer: hwlat: allow to be default bootup tracer

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Message-Id: <e7074fb64500370c2fbefd5503886f5e474cb9f6.1502451039.git.panand@redhat.com>
Date:   Fri, 11 Aug 2017 17:01:21 +0530
From:   Pratyush Anand <panand@...hat.com>
To:     rostedt@...dmis.org, Ingo Molnar <mingo@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Pratyush Anand <panand@...hat.com>
Subject: [PATCH] tracer: hwlat: allow to be default bootup tracer

hwlat is not a production kernel tracer, however it can be used to
identify any HW latency issue during kernel boot as well.Therefore call
init_hwlat_tracer() though core_initcall() so that we can pass
ftrace=hwlat in kernel commandline parameter and we can have hwlat as
default bootup tracer.

Signed-off-by: Pratyush Anand <panand@...hat.com>
---
 kernel/trace/trace_hwlat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index d7c8e4ec3d9d..09f8f0950b6c 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -630,4 +630,4 @@ __init static int init_hwlat_tracer(void)
 
 	return 0;
 }
-late_initcall(init_hwlat_tracer);
+core_initcall(init_hwlat_tracer);
-- 
2.9.4