ftrace: remove ftrace_ip_converted()

Remove the unneeded function ftrace_ip_converted().

Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/arm/kernel/ftrace.c

@@ -22,16 +22,6 @@
 static unsigned long bl_insn;
 static const unsigned long NOP = 0xe1a00000; /* mov r0, r0 */
 
-/* return true if mcount call site is already patched/no-op'ed */
-int ftrace_ip_converted(unsigned long pc)
-{
-	unsigned long save;
-
-	pc -= INSN_SIZE;
-	save = *(unsigned long *)pc;
-	return save == NOP;
-}
-
 unsigned char *ftrace_nop_replace(void)
 {
 	return (char *)&NOP;

arch/powerpc/kernel/ftrace.c

@@ -27,16 +27,6 @@ static unsigned int ftrace_nop = 0x60000000;
 # define GET_ADDR(addr) *(unsigned long *)addr
 #endif
 
-notrace int ftrace_ip_converted(unsigned long ip)
-{
-	unsigned int save;
-
-	ip -= CALL_BACK;
-	save = *(unsigned int *)ip;
-
-	return save == ftrace_nop;
-}
-
 static unsigned int notrace ftrace_calc_offset(long ip, long addr)
 {
 	return (int)((addr + CALL_BACK) - ip);

arch/sparc64/kernel/ftrace.c

@@ -7,13 +7,6 @@
 
 static const u32 ftrace_nop = 0x01000000;
 
-notrace int ftrace_ip_converted(unsigned long ip)
-{
-	u32 insn = *(u32 *) ip;
-
-	return (insn == ftrace_nop);
-}
-
 notrace unsigned char *ftrace_nop_replace(void)
 {
 	return (char *)&ftrace_nop;

arch/x86/kernel/ftrace.c

@@ -31,16 +31,6 @@ union ftrace_code_union {
 	} __attribute__((packed));
 };
 
-notrace int ftrace_ip_converted(unsigned long ip)
-{
-	unsigned long save;
-
-	ip -= CALL_BACK;
-	save = *(long *)ip;
-
-	return save == *ftrace_nop;
-}
-
 static int notrace ftrace_calc_offset(long ip, long addr)
 {
 	return (int)(addr - ip);

kernel/trace/ftrace.c

@@ -306,13 +306,6 @@ ftrace_record_ip(unsigned long ip)
 	if (ftrace_ip_in_hash(ip, key))
 		goto out_unlock;
 
-	/*
-	 * There's a slight race that the ftraced will update the
-	 * hash and reset here. If it is already converted, skip it.
-	 */
-	if (ftrace_ip_converted(ip))
-		goto out_unlock;
-
 	node = ftrace_alloc_dyn_node(ip);
 	if (!node)
 		goto out_unlock;