/* * uvm_map_extract: extract a mapping from a map and put it somewhere * (maybe removing the old mapping) * * => maps should be unlocked (we will write lock them) * => returns 0 on success, error code otherwise * => start must be page aligned * => len must be page sized * => flags: * UVM_EXTRACT_REMOVE: remove mappings from srcmap * UVM_EXTRACT_CONTIG: abort if unmapped area (advisory only) * UVM_EXTRACT_QREF: for a temporary extraction do quick obj refs * UVM_EXTRACT_FIXPROT: set prot to maxprot as we go * UVM_EXTRACT_PROT_ALL: set prot to UVM_PROT_ALL as we go * >>>NOTE: if you set REMOVE, you are not allowed to use CONTIG or QREF!<<< * >>>NOTE: QREF's must be unmapped via the QREF path, thus should only * be used from within the kernel in a kernel level map <<< */