MIPS: Tracing: Cleanup comments

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Cc: David Daney <david.s.daney@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/1225/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index d4a00d29c0bf0c02ca13e1aed17851fb42f49b2e..9a029d40f6cfe95952ae1f3eb2ad1bd8c0de65e4 100644 (file)
--- a/arch/mips/kernel/mcount.S
+++ b/arch/mips/kernel/mcount.S
@@ -6,6 +6,7 @@
  * more details.
  *
  * Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University, China
+ * Copyright (C) 2010 DSLab, Lanzhou University, China
  * Author: Wu Zhangjin <wuzhangjin@gmail.com>
  */
 
@@ -69,14 +70,14 @@ _mcount:
 
        MCOUNT_SAVE_REGS
 #ifdef KBUILD_MCOUNT_RA_ADDRESS
-       PTR_S   t0, PT_R12(sp)  /* t0 saved the location of the return address(at) by -mmcount-ra-address */
+       PTR_S   t0, PT_R12(sp)  /* save location of parent's return address */
 #endif
 
-       move    a0, ra          /* arg1: next ip, selfaddr */
+       move    a0, ra          /* arg1: self return address */
        .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 */
+        move   a1, AT          /* arg2: parent's return address */
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
        .globl ftrace_graph_call
@@ -117,9 +118,9 @@ NESTED(_mcount, PT_SIZE, ra)
 static_trace:
        MCOUNT_SAVE_REGS
 
-       move    a0, ra          /* arg1: next ip, selfaddr */
+       move    a0, ra          /* arg1: self return address */
        jalr    t2              /* (1) call *ftrace_trace_function */
-        move   a1, AT          /* arg2: the caller's next ip, parent */
+        move   a1, AT          /* arg2: parent's return address */
 
        MCOUNT_RESTORE_REGS
        .globl ftrace_stub