linux-kernel - [PATCH 03/12] ftrace: declare __{start,stop}_mcount

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Message-Id: <20161016151616.31451-4-vegard.nossum@oracle.com>
Date:   Sun, 16 Oct 2016 17:16:07 +0200
From:   Vegard Nossum <vegard.nossum@...cle.com>
To:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jiri Slaby <jslaby@...e.cz>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Luis R . Rodriguez" <mcgrof@...nel.org>,
        Vegard Nossum <vegard.nossum@...cle.com>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 03/12] ftrace: declare __{start,stop}_mcount_loc as external array

Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Vegard Nossum <vegard.nossum@...cle.com>
---
 kernel/trace/ftrace.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 2050a765..3c37036 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -13,6 +13,7 @@
  *  Copyright (C) 2004 Nadia Yvette Chambers
  */
 
+#include <linux/extarray.h>
 #include <linux/stop_machine.h>
 #include <linux/clocksource.h>
 #include <linux/kallsyms.h>
@@ -5075,10 +5076,10 @@ void ftrace_module_init(struct module *mod)
 }
 #endif /* CONFIG_MODULES */
 
+DECLARE_EXTARRAY(unsigned long, mcount_loc);
+
 void __init ftrace_init(void)
 {
-	extern unsigned long __start_mcount_loc[];
-	extern unsigned long __stop_mcount_loc[];
 	unsigned long count, flags;
 	int ret;
 
@@ -5088,7 +5089,7 @@ void __init ftrace_init(void)
 	if (ret)
 		goto failed;
 
-	count = __stop_mcount_loc - __start_mcount_loc;
+	count = ext_size(mcount_loc);
 	if (!count) {
 		pr_info("ftrace: No functions to be traced?\n");
 		goto failed;
@@ -5100,8 +5101,8 @@ void __init ftrace_init(void)
 	last_ftrace_enabled = ftrace_enabled = 1;
 
 	ret = ftrace_process_locs(NULL,
-				  __start_mcount_loc,
-				  __stop_mcount_loc);
+				  ext_start(mcount_loc),
+				  ext_end(mcount_loc));
 
 	set_ftrace_early_filters();
 
-- 
2.10.0.479.g221bd91