ftrace: remove mcount set

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@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

6 files changed, 0 insertions, 65 deletions

diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 76d50e6091bc..6c90479e8974 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -95,19 +95,6 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
         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)
 {
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 3855ceb937b0..6b75522e8b34 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -126,23 +126,6 @@ notrace int ftrace_update_ftrace_func(ftrace_func_t func)
         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 */
diff --git a/arch/sparc64/kernel/ftrace.c b/arch/sparc64/kernel/ftrace.c
index 4298d0aee713..447942041a7c 100644
--- a/arch/sparc64/kernel/ftrace.c
+++ b/arch/sparc64/kernel/ftrace.c
@@ -69,24 +69,6 @@ notrace int ftrace_update_ftrace_func(ftrace_func_t func)
         return ftrace_modify_code(ip, old, new);
 }
 
-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)
 {
         ftrace_mcount_set(data);
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index da4fb0deecf7..b399eed23538 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -103,13 +103,6 @@ notrace int ftrace_update_ftrace_func(ftrace_func_t func)
         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[];
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ac58e94668b7..1c4835f86911 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -71,7 +71,6 @@ extern int ftrace_ip_converted(unsigned long ip);
 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_update_ftrace_func(ftrace_func_t func);
 extern void ftrace_caller(void);
 extern void ftrace_call(void);
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e758cab0836f..226fd9132d53 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -620,7 +620,6 @@ static int ftrace_update_code(void *ignore);
 
 static int __ftrace_modify_code(void *data)
 {
-        unsigned long addr;
         int *command = data;
 
         if (*command & FTRACE_ENABLE_CALLS) {
@@ -639,14 +638,6 @@ static int __ftrace_modify_code(void *data)
         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;
 }