In dev_pager_updatefake, m->valid is typically 0 on entry.  It should be set to VM_PAGE_BITS_ALL before returning, to ensure that neither vm_pager_get_pages nor vm_fault calls vm_page_zero_invalid after dev_pager_getpages has returned.
In dev_pager_updatefake, m->valid is typically 0 on entry.  It
should be set to VM_PAGE_BITS_ALL before returning, to ensure that
neither vm_pager_get_pages nor vm_fault calls vm_page_zero_invalid
after dev_pager_getpages has returned.

Submitted by: tegge

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase