Re: kernel 2.6.39 (user mode linux) crashes (2.6.38 works fine)
From: Peter Zijlstra
Date: Sat May 21 2011 - 18:38:13 EST
On Sat, 2011-05-21 at 12:12 +0200, richard -rw- weinberger wrote:
> 2011/5/21 Toralf FÃrster <toralf.foerster@xxxxxx>:
> > Bisecting gave :
> > git bisect badd123375425d7df4b6081a631fc1203fceafa59b2 is the first bad commit
> > commit d123375425d7df4b6081a631fc1203fceafa59b2
> > Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > Date: Wed Jan 26 21:32:01 2011 +0100
> > rwsem: Remove redundant asmregparm annotation
> > Peter Zijlstra pointed out, that the only user of asmregparm (x86) is
> > compiling the kernel already with -mregparm=3. So the annotation of
> > the rwsem functions is redundant. Remove it.
> Ok, this bisect makes much more sense.
> Thomas, Peter, please revert d123375425d7df4b6081a631fc1203fceafa59b2.
> We cannot compile UML with -mregparm=3 it would cause a lot of trouble.
> It would break 32bit UML on 64bit and also on older 32bit systems like RHEL5.
Also, having to carry that asmregparm notation just for uml doesn't seem
worth the trouble.
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