linux-kernel - [PATCH] tracing: Remove obsolete sched

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Message-Id: <20171003010337.8026-1-joelaf@google.com>
Date:   Mon,  2 Oct 2017 18:03:37 -0700
From:   Joel Fernandes <joelaf@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Joel Fernandes <joelaf@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH] tracing: Remove obsolete sched_switch selftest

Since commit 87d80de2800d087ea833cb79bc13f85ff34ed49f ("tracing: Remove
obsolete sched_switch tracer"), the sched_switch selftest is no longer used.
This patch removes the same.

Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Joel Fernandes <joelaf@...gle.com>
---
This is a resend of the same patch:
https://patchwork.kernel.org/patch/9945269/

 kernel/trace/trace.h          |  2 --
 kernel/trace/trace_selftest.c | 32 --------------------------------
 2 files changed, 34 deletions(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index fb5d54d0d1b3..14778bfecec8 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -736,8 +736,6 @@ extern int trace_selftest_startup_wakeup(struct tracer *trace,
 					 struct trace_array *tr);
 extern int trace_selftest_startup_nop(struct tracer *trace,
 					 struct trace_array *tr);
-extern int trace_selftest_startup_sched_switch(struct tracer *trace,
-					       struct trace_array *tr);
 extern int trace_selftest_startup_branch(struct tracer *trace,
 					 struct trace_array *tr);
 /*
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index b17ec642793b..364f78abdf47 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -1150,38 +1150,6 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
 }
 #endif /* CONFIG_SCHED_TRACER */
 
-#ifdef CONFIG_CONTEXT_SWITCH_TRACER
-int
-trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr)
-{
-	unsigned long count;
-	int ret;
-
-	/* start the tracing */
-	ret = tracer_init(trace, tr);
-	if (ret) {
-		warn_failed_init_tracer(trace, ret);
-		return ret;
-	}
-
-	/* Sleep for a 1/10 of a second */
-	msleep(100);
-	/* stop the tracing. */
-	tracing_stop();
-	/* check the trace buffer */
-	ret = trace_test_buffer(&tr->trace_buffer, &count);
-	trace->reset(tr);
-	tracing_start();
-
-	if (!ret && !count) {
-		printk(KERN_CONT ".. no entries found ..");
-		ret = -1;
-	}
-
-	return ret;
-}
-#endif /* CONFIG_CONTEXT_SWITCH_TRACER */
-
 #ifdef CONFIG_BRANCH_TRACER
 int
 trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
-- 
2.14.2.822.g60be5d43e6-goog