Introduce a new function, pmap_wb_page(), which check all userland mappings for a given page and, if the pmap is the current pmap, write back the associated cache line. Use pmap_wb_page in pmap_qenter() instead of inconditionally write back/invalidating the data cache.
Introduce a new function, pmap_wb_page(), which check all userland mappings for
a given page and, if the pmap is the current pmap, write back the associated
cache line.
Use pmap_wb_page in pmap_qenter() instead of inconditionally
write back/invalidating the data cache.

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