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| author | Wu Zhangjin <wuzhangjin@gmail.com> | 2010-05-14 13:08:28 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-07-05 18:17:27 +0200 |
| commit | 042e571d224707b777d0995317c74812b960bfeb (patch) | |
| tree | 0f333bfe75eadff72a8543e2370bbbefd268e02e /arch/mips/kernel/mcount.S | |
| parent | MIPS: Tracing: Cleanup the arguments passing of prepare_ftrace_return (diff) | |
| download | linux-042e571d224707b777d0995317c74812b960bfeb.tar.xz linux-042e571d224707b777d0995317c74812b960bfeb.zip | |
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.S | 11 |
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 |