1 files changed, 29 insertions, 0 deletions

diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index cbb45edad464..ffc425979d4f 100644
--- a/arch/mips/kernel/mcount.S
+++ b/arch/mips/kernel/mcount.S
@@ -58,6 +58,33 @@
          move ra, AT
         .endm
 
+#ifdef CONFIG_DYNAMIC_FTRACE
+
+NESTED(ftrace_caller, PT_SIZE, ra)
+        .globl _mcount
+_mcount:
+        b       ftrace_stub
+         nop
+        lw      t0, function_trace_stop
+        bnez    t0, ftrace_stub
+         nop
+
+        MCOUNT_SAVE_REGS
+
+        move    a0, ra          /* arg1: next ip, selfaddr */
+        .globl ftrace_call
+ftrace_call:
+        nop     /* a placeholder for the call to a real tracing function */
+         move   a1, AT          /* arg2: the caller's next ip, parent */
+
+        MCOUNT_RESTORE_REGS
+        .globl ftrace_stub
+ftrace_stub:
+        RETURN_BACK
+        END(ftrace_caller)
+
+#else   /* ! CONFIG_DYNAMIC_FTRACE */
+
 NESTED(_mcount, PT_SIZE, ra)
         lw      t0, function_trace_stop
         bnez    t0, ftrace_stub
@@ -82,5 +109,7 @@ ftrace_stub:
         RETURN_BACK
         END(_mcount)
 
+#endif  /* ! CONFIG_DYNAMIC_FTRACE */
+
         .set at
         .set reorder