[PATCH 10/11] ftrace: remove mcount set

[Steven Rostedt]

The arch dependent function ftrace_mcount_set was only used by the daemon
start up code. This patch removes it.

Signed-off-by: Steven Rostedt <srostedt@xxxxxxxxxx>
---
 arch/arm/kernel/ftrace.c     |   13 -------------
 arch/powerpc/kernel/ftrace.c |   17 -----------------
 arch/x86/kernel/ftrace.c     |    7 -------
 include/linux/ftrace.h       |    1 -
 kernel/trace/ftrace.c        |    9 ---------
 5 files changed, 47 deletions(-)

Index: linux-compile.git/arch/arm/kernel/ftrace.c
===================================================================
--- linux-compile.git.orig/arch/arm/kernel/ftrace.c	2008-10-22 13:10:52.000000000 -0400
+++ linux-compile.git/arch/arm/kernel/ftrace.c	2008-10-22 13:23:54.000000000 -0400
@@ -95,19 +95,6 @@ int ftrace_update_ftrace_func(ftrace_fun
 	return ret;
 }
 
-int ftrace_mcount_set(unsigned long *data)
-{
-	unsigned long pc, old;
-	unsigned long *addr = data;
-	unsigned char *new;
-
-	pc = (unsigned long)&mcount_call;
-	memcpy(&old, &mcount_call, MCOUNT_INSN_SIZE);
-	new = ftrace_call_replace(pc, *addr);
-	*addr = ftrace_modify_code(pc, (unsigned char *)&old, new);
-	return 0;
-}
-
 /* run from kstop_machine */
 int __init ftrace_dyn_arch_init(void *data)
 {
Index: linux-compile.git/arch/powerpc/kernel/ftrace.c
===================================================================
--- linux-compile.git.orig/arch/powerpc/kernel/ftrace.c	2008-10-22 13:10:52.000000000 -0400
+++ linux-compile.git/arch/powerpc/kernel/ftrace.c	2008-10-22 13:23:54.000000000 -0400
@@ -126,23 +126,6 @@ notrace int ftrace_update_ftrace_func(ft
 	return ret;
 }
 
-notrace int ftrace_mcount_set(unsigned long *data)
-{
-	unsigned long ip = (long)(&mcount_call);
-	unsigned long *addr = data;
-	unsigned char old[MCOUNT_INSN_SIZE], *new;
-
-	/*
-	 * Replace the mcount stub with a pointer to the
-	 * ip recorder function.
-	 */
-	memcpy(old, &mcount_call, MCOUNT_INSN_SIZE);
-	new = ftrace_call_replace(ip, *addr);
-	*addr = ftrace_modify_code(ip, old, new);
-
-	return 0;
-}
-
 int __init ftrace_dyn_arch_init(void *data)
 {
 	/* This is running in kstop_machine */
Index: linux-compile.git/arch/x86/kernel/ftrace.c
===================================================================
--- linux-compile.git.orig/arch/x86/kernel/ftrace.c	2008-10-22 13:16:35.000000000 -0400
+++ linux-compile.git/arch/x86/kernel/ftrace.c	2008-10-22 13:23:54.000000000 -0400
@@ -105,13 +105,6 @@ notrace int ftrace_update_ftrace_func(ft
 	return ret;
 }
 
-notrace int ftrace_mcount_set(unsigned long *data)
-{
-	/* mcount is initialized as a nop */
-	*data = 0;
-	return 0;
-}
-
 int __init ftrace_dyn_arch_init(void *data)
 {
 	extern const unsigned char ftrace_test_p6nop[];
Index: linux-compile.git/include/linux/ftrace.h
===================================================================
--- linux-compile.git.orig/include/linux/ftrace.h	2008-10-22 13:17:29.000000000 -0400
+++ linux-compile.git/include/linux/ftrace.h	2008-10-22 13:23:54.000000000 -0400
@@ -71,7 +71,6 @@ extern int ftrace_ip_converted(unsigned 
 extern unsigned char *ftrace_nop_replace(void);
 extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr);
 extern int ftrace_dyn_arch_init(void *data);
-extern int ftrace_mcount_set(unsigned long *data);
 extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code,
 			      unsigned char *new_code);
 extern int ftrace_update_ftrace_func(ftrace_func_t func);
Index: linux-compile.git/kernel/trace/ftrace.c
===================================================================
--- linux-compile.git.orig/kernel/trace/ftrace.c	2008-10-22 13:21:46.000000000 -0400
+++ linux-compile.git/kernel/trace/ftrace.c	2008-10-22 13:23:54.000000000 -0400
@@ -606,7 +606,6 @@ static int ftrace_update_code(void *igno
 
 static int __ftrace_modify_code(void *data)
 {
-	unsigned long addr;
 	int *command = data;
 
 	if (*command & FTRACE_ENABLE_CALLS) {
@@ -625,14 +624,6 @@ static int __ftrace_modify_code(void *da
 	if (*command & FTRACE_UPDATE_TRACE_FUNC)
 		ftrace_update_ftrace_func(ftrace_trace_function);
 
-	if (*command & FTRACE_ENABLE_MCOUNT) {
-		addr = (unsigned long)ftrace_record_ip;
-		ftrace_mcount_set(&addr);
-	} else if (*command & FTRACE_DISABLE_MCOUNT) {
-		addr = (unsigned long)ftrace_stub;
-		ftrace_mcount_set(&addr);
-	}
-
 	return 0;
 }
 

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