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amd64 pmap: adjust the empty pmap optimization in pmap_remove()

Description

amd64 pmap: adjust the empty pmap optimization in pmap_remove()

(cherry picked from commit 0b3bc7288984c17da00d9f8c29f116d56bf44d35)

Details

Provenance
kibAuthored on Oct 20 2021, 8:30 PM
Parents
rG2f71c973efdf: amd64 pmap: account for the top-level pages
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