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authorWu Zhangjin <wuzhangjin@gmail.com>2010-05-14 19:08:28 +0800
committerRalf Baechle <ralf@linux-mips.org>2010-07-05 17:17:27 +0100
commit042e571d224707b777d0995317c74812b960bfeb (patch)
tree0f333bfe75eadff72a8543e2370bbbefd268e02e /arch/mips/kernel/mcount.S
parentcbe555b01b0da9e89afa4babf3b8942d2b052fb8 (diff)
downloadlinux-042e571d224707b777d0995317c74812b960bfeb.tar.gz
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>
Diffstat (limited to 'arch/mips/kernel/mcount.S')
-rw-r--r--arch/mips/kernel/mcount.S11
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S
index d4a00d29c0bf..9a029d40f6cf 100644
--- 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