Bug#538332: linux-2.6: [x86] Null pointer dereference in hrtick_start_fair.

[Alok Kataria <akataria@vmware.com>]

> > I see, though I must say that its really confusing for a person like me,
> > I had assume that kernel version 2.6.26 will have all the stuff from the
> > vanilla tree, but it seems you do things differently. 
> 
> We may still be talking about two different things. We are based upon
> the vanilla 2.6.26 tree, but the tsc merging didn't appear to happen
> unil 2.6.27-rc1.
> 
> Specifically, the tsc.c file was introduced here:
> 
> commit 0ef95533326a7b37d16025af9edc0c18e644b346
> Author: Alok Kataria <akataria@vmware.com>
> Date:   Tue Jul 1 11:43:18 2008 -0700
> 
>     x86: merge sched_clock handling
>     
>     Move the basic global variable definitions and sched_clock
>     handling in the
>     common "tsc.c" file.
>     
>      - Unify notsc kernel command line handling for 32 bit and 64bit.
>      - Functional changes for 64bit.
>             - "tsc_disabled" is updated if "notsc" is passed at
> 	    boottime.
>             - Fallback to jiffies for sched_clock, incase notsc is
> 	    passed on
>           commandline.
>     
>     Signed-off-by: Alok N Kataria <akataria@vmware.com>
>     Signed-off-by: Dan Hecht <dhecht@vmware.com>
>     Cc: Dan Hecht <dhecht@vmware.com>
>     Signed-off-by: Ingo Molnar <mingo@elte.hu>
> 
> dannf@krebs:~/git/linux-2.6$ git name-rev 0ef95533326a7b37d16025af9edc0c18e644b346
> 0ef95533326a7b37d16025af9edc0c18e644b346 tags/v2.6.27-rc1~1102^2~72

Okay.

I was looking at 
-bash-3.2$ git describe 0ef95533326a7b37d16025af9edc0c18e644b346
v2.6.26-rc9-715-g0ef9553

Which made me think that it should be in the 2.6.26 vanilla release, but
I think git-describe shows the time-frame when it hit Ingo's tip tree.
That seemed to have confused me. 


Alok
> 
>   -dann