cf35cc4c68
by pmap_qenter() and pmap_qremove() is pointless. In fact, it probably leads to unnecessary pmap_page_protect() calls if one of these pages is paged out after unwiring. Note: setting PG_MAPPED asserts that the page's pv list may be non-empty. Since checking the status of the page's pv list isn't any harder than checking this flag, the flag should probably be eliminated. Alternatively, PG_MAPPED could be set by pmap_enter() exclusively rather than various places throughout the kernel.
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