userfaultfd: selftest: cleanup help messages

Firstly, the help in the comment region is obsolete, now we support
three parameters.  Since at it, change it and move it into the help
message of the program.

Also, the help messages dumped here and there is obsolete too.  Use a
single usage() helper.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Peter Xu <[email protected]>
Acked-by: Mike Rapoport <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Mike Kravetz <[email protected]>
Cc: Jerome Glisse <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: "Kirill A . Shutemov" <[email protected]>
Cc: Shaohua Li <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: "Dr . David Alan Gilbert" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions