linux-kernel - tracing: Replace __get_cpu_var uses with this_cpu

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Date:	Tue, 29 Apr 2014 14:17:40 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Ingo Molnar <mingo@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel@...r.kernel.org
Subject: tracing: Replace __get_cpu_var uses with this_cpu_ptr

Replace uses of &__get_cpu_var for address calculation with this_cpu_ptr.

Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Signed-off-by: Christoph Lameter <cl@...ux.com>

Index: linux/include/linux/kprobes.h
===================================================================
--- linux.orig/include/linux/kprobes.h	2014-04-28 13:09:07.228660946 -0500
+++ linux/include/linux/kprobes.h	2014-04-28 13:09:07.224661022 -0500
@@ -356,7 +356,7 @@

 static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
 {
-	return (&__get_cpu_var(kprobe_ctlblk));
+	return this_cpu_ptr(&kprobe_ctlblk);
 }

 int register_kprobe(struct kprobe *p);
Index: linux/kernel/trace/ftrace.c
===================================================================
--- linux.orig/kernel/trace/ftrace.c	2014-04-28 13:09:07.228660946 -0500
+++ linux/kernel/trace/ftrace.c	2014-04-28 13:09:07.224661022 -0500
@@ -817,7 +817,7 @@

 	local_irq_save(flags);

-	stat = &__get_cpu_var(ftrace_profile_stats);
+	stat = this_cpu_ptr(&ftrace_profile_stats);
 	if (!stat->hash || !ftrace_profile_enabled)
 		goto out;

@@ -848,7 +848,7 @@
 	unsigned long flags;

 	local_irq_save(flags);
-	stat = &__get_cpu_var(ftrace_profile_stats);
+	stat = this_cpu_ptr(&ftrace_profile_stats);
 	if (!stat->hash || !ftrace_profile_enabled)
 		goto out;

Index: linux/kernel/trace/trace.c
===================================================================
--- linux.orig/kernel/trace/trace.c	2014-04-28 13:09:07.228660946 -0500
+++ linux/kernel/trace/trace.c	2014-04-28 13:09:07.228660946 -0500
@@ -1728,7 +1728,7 @@
 	 */
 	barrier();
 	if (use_stack == 1) {
-		trace.entries		= &__get_cpu_var(ftrace_stack).calls[0];
+		trace.entries		= this_cpu_ptr(ftrace_stack.calls);
 		trace.max_entries	= FTRACE_STACK_MAX_ENTRIES;

 		if (regs)
--
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