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SubjectRe: [PATCH] Fix preemptible lazy mode bug
>I agree.  The patch is a nop.  I just got overly paranoid.  The whole
>thing is just very prone to bugs.
So do we need a patch for .23 or not?

>; it does
> seem perfectly acceptable though for the mm code to use kmap or vmap
> (not kmap_atomic) internally somewhere in the pagetable code.

i386 does it all the time for highmem pagetables in fact.

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