On Mon, 2009-10-26 at 12:45 -0400, Steven Rostedt wrote: > On Tue, 2009-10-27 at 00:35 +0800, Wu Zhangjin wrote: > > > If remove the long jump, we at least to change the $mcount_regex in > > scripts/recordmcount.pl, the addr + 12 in arch/mips/include/asm/ftrace.h > > and the _mcount & ftrace_caller in mcount.S and the ftrace_make_nop & > > ftrace_make_call in arch/mips/kernel/ftrace.c back to the -v4 version. > > > > I think this method of supporting module is not that BAD, no obvious > > overhead added except the "lui...addiu..." and two more "nop" > > instructions. and it's very understandable, so, just use this version? > > You don't nop the lui and addiu do you? If you do you will crash the > machine. Not test it yet, Seems what you have mentioned in another thread: b 1f .... 1: is a good idea, it will only left one "lui" and one "b 1f" instruction there. (I'm sleepy now, the time is Tue Oct 27 01:34:51 CST 2009 in China, See you~~) Regards, Wu Zhangjin
