Re: Bug: duplicate marker entry in Modules.marker

[Wenji Huang <wenji dot huang at oracle dot com>]

Roland McGrath wrote:
> I think modpost always merges the contents of the old file.
> This is necessary for the separate runs for vmlinux and each module.
> Perhaps the run for vmlinux should wipe the file.
> But I'm not sure off hand that modpost will always be run for
> each .ko in that case.

Yes, modpost will re run in building for every module.

For .ko, there are two cases:

 1. In kernel source tree, some stuff which are configured as M:
   Define marker in module -> "make modules" -> Modify -> "make modules"
      there are two entries.

 2. External module, such as probe module generated by staprun.
   Define marker in module -> Build -> Modify -> Build
   there is only one entry. In fact, another Module.markers exists in
   the module dir.

So I think just only to empty the file in the run for vmlinux is not
enough. "make modules" need to keep the marker entry in vmlinux and 
regenerate
others.

Regards.
Wenji