Public bug reported:

SRU Justification

Impact: shiftfs is currently passing down an unsigned long to
copy_from_user() which expects a void __user * pointer. This will cause
the compiler to complain because of mismatching types and in general is
rather ugly.

Regression Potential: Limited to shiftfs.

Test Case: Compile kernel with patch and see that compiler does not
complain anymore.

Target Kernels: All LTS kernels with shiftfs support.

Patches:
https://github.com/brauner/ubuntu-disco/tree/shiftfs_direct_io

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Christian Brauner (cbrauner)
         Status: In Progress

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Christian Brauner (cbrauner)

** Changed in: linux (Ubuntu)
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1837231

Title:
  UBUNTU: SAUCE: shiftfs: pass correct point down

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