linux-kernel - [PATCH] ftrace: Add missing __init in ftrace_profile

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Message-ID: <b9df5fa10907120358t7101511cle30e025c3adcbe54@mail.gmail.com>
Date:	Sun, 12 Jul 2009 16:58:18 +0600
From:	Rakib Mullick <rakib.mullick@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH] ftrace: Add missing __init in ftrace_profile_debugfs()

 Impact: Fix section mismatch.

The function ftrace_profile_debugfs() references a variable placed in
.init.data section. Thus causes a section mismatch warning. Since
ftrace_profile_debugfs() has been called from only
ftrace_init_debugfs, so we can safely mark ftrace_profile_debugfs as
init. Also it contains a trivial style fix, __init should be placed
between function type and function name (ftrace_init_debugfs).

We were warned by the following warning:

 LD      kernel/trace/libftrace.o
WARNING: kernel/trace/libftrace.o(.text+0xff0): Section mismatch in
reference from the function ftrace_profile_debugfs() to the variable
.init.data:function_stats
The function ftrace_profile_debugfs() references
the variable __initdata function_stats.
This is often because ftrace_profile_debugfs lacks a __initdata
annotation or the annotation of function_stats is wrong.

---
Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>

--- linus/kernel/trace/ftrace.c	2009-07-11 20:54:13.000000000 +0600
+++ rakib/kernel/trace/ftrace.c	2009-07-12 12:21:54.000000000 +0600
@@ -768,7 +768,7 @@ static struct tracer_stat function_stats
 	.stat_show	= function_stat_show
 };

-static void ftrace_profile_debugfs(struct dentry *d_tracer)
+static void __init ftrace_profile_debugfs(struct dentry *d_tracer)
 {
 	struct ftrace_profile_stat *stat;
 	struct dentry *entry;
@@ -813,7 +813,7 @@ static void ftrace_profile_debugfs(struc
 }

 #else /* CONFIG_FUNCTION_PROFILER */
-static void ftrace_profile_debugfs(struct dentry *d_tracer)
+static void __init ftrace_profile_debugfs(struct dentry *d_tracer)
 {
 }
 #endif /* CONFIG_FUNCTION_PROFILER */
@@ -3068,7 +3068,7 @@ static const struct file_operations ftra
 	.write = ftrace_pid_write,
 };

-static __init int ftrace_init_debugfs(void)
+static int __init ftrace_init_debugfs(void)
 {
 	struct dentry *d_tracer;
--
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