Avoid jumping cursor after undo

I have defined this function:

fun! Lint()
let l:view = winsaveview()
keepjumps normal gggqG
call winrestview(l:view)
endf

When the function is executed, the cursor does not move, as expected.
Unfortunately, pressing u after that makes the cursor jump to the top of
the buffer. I had hoped that keepjumps would prevent that, but that does
not seem the case. How can I avoid moving the cursor upon undoing
(without touching registers)?

Thanks,
Life.

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