linux-kernel - Re: [PATCH v1 1/10] Move Macro W to insn.h

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Date:	Sat, 20 Mar 2010 11:50:06 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
CC:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/10] Move Macro W to insn.h

Srikar Dronamraju wrote:
> Move Macro W to asm/insn.h
> 
> Macro W used to know if the instructions are valid for
> user-space/kernel space.  This macro is used by kprobes and
> user_bkpt. (i.e user space breakpoint assistance layer.) So moving it
> to a common header file asm/insn.h.

Hmm, I don't think this shortest macro name is good to expose
commonly... And also, since we already have inat (instruction
attribute) table, we'd better expand an inat bit to indicate
which instruction can be probed/boosted.

Thank you,

-- 
Masami Hiramatsu
e-mail: mhiramat@...hat.com

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