linux-kernel - 2.6.25-rc8-mm2 - CONFIG_PROFILE

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Message-ID: <4045.1207990361@turing-police.cc.vt.edu>
Date:	Sat, 12 Apr 2008 04:52:41 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: 2.6.25-rc8-mm2 - CONFIG_PROFILE_LIKELY broke again...

On Thu, 10 Apr 2008 20:33:54 PDT, Andrew Morton said:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc8/2.6.25-rc8-mm2/

OK, I found the issue I was chasing when I noticed the WARN from genapic_64.c.

After seeing that I'd gotten all the way to remove-div_long_long_rem.patch I
took a close look at the remaining several dozen patches, and took a wild
stab in the dark.. .and ta-da...

PROFILE_LIKELY broke between -rc8-mm1 and -rc8-mm2.  Setting it to 'y'
gets me an instant reboot similar to what I was seeing against -rc2-mm.

And changed between -mm1 and -mm2 (datestamp of 04/08):

patches/profile-likely-unlikely-macros.patch
patches/profile-likely-unlikely-macros-fix.patch

I found the profile-likely-unlikely-macros-fix-2.patch from last time around,
but the code has changed a bunch since then so it isn't a clean apply (and in
fact, it's so different it's not even easily hand-patchable - stuff like
!!(foo) has appeared).  

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