linux-kernel - Re: [PATCH -tip ] [BUGFIX] kprobes: Move hash

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Message-ID: <513F0C74.4030101@hitachi.com>
Date:	Tue, 12 Mar 2013 20:07:32 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Timo Juhani Lindfors <timo.lindfors@....fi>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Nadia Yvette Chambers <nyc@...omorphy.com>,
	yrl.pp-manager.tt@...achi.com,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH -tip ] [BUGFIX] kprobes: Move hash_64() into .text.kprobe
 section

(2013/03/12 17:21), Ingo Molnar wrote:
> 
> * Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:
> 
>> @@ -31,7 +32,7 @@
>>  #error Wordsize not 32 or 64
>>  #endif
>>  
>> -static inline u64 hash_64(u64 val, unsigned int bits)
>> +static __kprobes inline u64 hash_64(u64 val, unsigned int bits)
>>  {
>>  	u64 hash = val;
> 
> We should also, really, really fix the '__kprobes' misnomer and switch to 
> the '__noprobe' pattern or so. The naming does not make it obvious at all 
> that what we do here is to turn _off_ kprobing of select functions...

Agreed.

> The only complication is that __kprobes is now present in 600+ places, 
> which will create merge conflicts. If you remind me during the next merge 
> window I can generate the rename on the spot and send it to Linus without 
> anyone having to carry the patch for too long.

Let me confirm that I just move __kprobes definition into
compiler.h this time, and ping you when the next merge
window opens, is that correct?

Thank you,

-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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