Commit 47dbc906 authored Sep 27, 2015 by Paul Gortmaker Committed by Paul E. McKenney Dec 04, 2015

kernel: Make rcu/tree_trace.c explicitly non-modular



The Kconfig currently controlling compilation of this code is:

init/Kconfig:config TREE_RCU_TRACE
init/Kconfig:   def_bool RCU_TRACE && ( TREE_RCU || PREEMPT_RCU )

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the file there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.  We could
consider moving this to an earlier initcall if desired.

We don't replace module.h with init.h since the file already has that.
We also delete the moduleparam.h include that is left over from
commit 64db4cff (""Tree RCU": scalable
classic RCU implementation") since it is not needed here either.

We morph some tags like MODULE_AUTHOR into the comments at the top of
the file for documentation purposes.

Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent 3dc5dbe9

kernel/rcu/tree_trace.c

+3 −16

Original line number	Diff line number	Diff line
		/*
		* Read-Copy Update tracing for classic implementation
		* Read-Copy Update tracing for hierarchical implementation.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		@@ -16,6 +16,7 @@
		* http://www.gnu.org/licenses/gpl-2.0.html.
		*
		* Copyright IBM Corporation, 2008
		* Author: Paul E. McKenney
		*
		* Papers: http://www.rdrop.com/users/paulmck/RCU
		*
		@@ -33,9 +34,7 @@
		#include <linux/sched.h>
		#include <linux/atomic.h>
		#include <linux/bitops.h>
		#include <linux/module.h>
		#include <linux/completion.h>
		#include <linux/moduleparam.h>
		#include <linux/percpu.h>
		#include <linux/notifier.h>
		#include <linux/cpu.h>
		@@ -487,16 +486,4 @@ free_out:
		debugfs_remove_recursive(rcudir);
		return 1;
		}

		static void __exit rcutree_trace_cleanup(void)
		{
		debugfs_remove_recursive(rcudir);
		}


		module_init(rcutree_trace_init);
		module_exit(rcutree_trace_cleanup);

		MODULE_AUTHOR("Paul E. McKenney");
		MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation");
		MODULE_LICENSE("GPL");
		device_initcall(rcutree_trace_init);

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