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Sorry for the delay...

Attached is a patch that does what was previously proposed, with the
following changes:

  - The 'seq' number is initialized to 1 instead of 0,
  - Before entering the copying procedure we're locking a
    "sysctl_file_marker" lock to make sure there's only one user of the
  - Once done, if after bumping 'seq' it wraps (i.e. goes back to 0),
    run through all processes and files (the aforementioned lock, as
    well as proc_lock, are locked) and reset their marker to 0. Then,
    bump 'seq' again to 1.

This has been tested locally, and a kernel module is available if anyone
is interested in further testing it on their own.

Please take a moment to review.



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