linux-kernel - Re: [PATCH 3/4] x86: add kprobe-booster to X86

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Date:	Tue, 18 Dec 2007 18:30:00 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Roland McGrath <roland@...hat.com>,
	Arjan van de Ven <arjan@...radead.org>,
	prasanna@...ibm.com, anil.s.keshavamurthy@...el.com,
	davem@...emloft.net, systemtap-ml <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 3/4] x86: add kprobe-booster to X86_64

On Tue, 2007-12-18 at 08:50 -0500, Masami Hiramatsu wrote:
> Hi Harvey,
> 
> Thank you for cleaning this up.
> 
> Harvey Harrison wrote:
> > Subject: [PATCH] x86: kprobes leftover cleanups
> > 
> > Eliminate __always_inline, all of these static functions are
> > only called once.  Minor whitespace cleanup.  Eliminate one
> > supefluous return at end of void function.  Reverse sense of
> > #ifndef to be #ifdef to show the case only affects X86_32.
> 
> Unfortunately, to prevent kprobe recursive call, all functions which
> is called from kprobes must be inlined or have __kprobes.
> If __always_inline macro still work, I prefer to use it. If not,
> it must have a __kprobe attribute like as below.

I thought all static functions that were only called once were
automatically inlined these days?  Otherwise __always_inline and
inline are exactly the same in the kernel.

Harvey

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