[CRIU] [PATCH 4/5] vdso: parasite -- Prepare new vdso mark structure.

[Cyrill Gorcunov]

On Wed, Jun 11, 2014 at 03:23:24PM +0400, Pavel Emelyanov wrote:
> On 06/10/2014 10:16 PM, Cyrill Gorcunov wrote:
> > 
> > Because of new vvar area we need to carry the
> > address of vvar proxy inside the mark. Thus
> > add members needed and update routines.
> > 
> > Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
> > ---
> >  arch/x86/include/asm/vdso.h | 36 ++++++++++++++++++++++++++++--------
> >  arch/x86/vdso-pie.c         |  2 +-
> >  arch/x86/vdso.c             |  4 ++--
> >  include/parasite.h          |  3 ++-
> >  pie/parasite.c              |  6 ++++--
> >  5 files changed, 37 insertions(+), 14 deletions(-)
> > 
> 
> 
> > struct vdso_mark {
> >  	u64			signature;
> > -	unsigned long		proxy_addr;
> > +	unsigned long		proxy_vdso_addr;
> > +
> > +	unsigned long		version;
> 
> Why do we need the version field? AFAIU the signature is enough.

In case if we need to change it again, we can increase the version
instead of changing signature (which is neat in ascii form now ;)