linux-kernel - Re: [PATCH] ftrace: Make ftrace_test

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Date:	Fri, 10 Oct 2008 10:54:29 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Anders Kaseorg <andersk@....EDU>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] ftrace: Make ftrace_test_p6nop disassembler-friendly


* Anders Kaseorg <andersk@....EDU> wrote:

> Commit 4c3dc21b136f8cb4b72afee16c3ba7e961656c0b in tip introduced the
> 5-byte NOP ftrace_test_p6nop:
>   jmp . + 5
>   .byte 0x00, 0x00, 0x00
> This is not friendly to disassemblers because an odd number of 0x00s
> ends in the middle of an instruction boundary.  This changes the 0x00s
> to 1-byte NOPs (0x90).
> 
> Signed-off-by: Anders Kaseorg <andersk@....edu>

applied to tip/tracing/ftrace, good spotting Anders!

Steve, any objections?

	Ingo
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