linux-master/mm/nommu.c

698 	unsigned long capabilities, rlen;
731 			capabilities = file->f_op->mmap_capabilities(file);
733 			/* no explicit capabilities set, so assume some
738 				capabilities = NOMMU_MAP_COPY;
742 				capabilities =
753 		/* eliminate any capabilities that we can't support on this
756 			capabilities &= ~NOMMU_MAP_DIRECT;
758 			capabilities &= ~NOMMU_MAP_COPY;
774 			if (!(capabilities & NOMMU_MAP_DIRECT))
778 			capabilities &= ~NOMMU_MAP_COPY;
782 			if (!(capabilities & NOMMU_MAP_COPY))
788 				capabilities &= ~NOMMU_MAP_DIRECT;
791 		if (capabilities & NOMMU_MAP_DIRECT) {
792 			if (((prot & PROT_READ)  && !(capabilities & NOMMU_MAP_READ))  ||
793 			    ((prot & PROT_WRITE) && !(capabilities & NOMMU_MAP_WRITE)) ||
794 			    ((prot & PROT_EXEC)  && !(capabilities & NOMMU_MAP_EXEC))
796 				capabilities &= ~NOMMU_MAP_DIRECT;
812 				if (capabilities & NOMMU_MAP_EXEC)
817 			 !(capabilities & NOMMU_MAP_EXEC)
820 			capabilities &= ~NOMMU_MAP_DIRECT;
826 		capabilities = NOMMU_MAP_COPY;
840 	*_capabilities = capabilities;
851 					unsigned long capabilities)
865 		if (capabilities & NOMMU_MAP_DIRECT)
866 			vm_flags |= (capabilities & NOMMU_VMFLAGS);
883 			    (capabilities & NOMMU_VMFLAGS);
917 			   unsigned long capabilities)
929 	if (capabilities & NOMMU_MAP_DIRECT) {
1025 	unsigned long capabilities, result;
1034 				    &capabilities);
1044 	vm_flags |= determine_vm_flags(file, prot, flags, capabilities);
1110 				if (!(capabilities & NOMMU_MAP_DIRECT))
1147 		if (capabilities & NOMMU_MAP_DIRECT) {
1159 				if (!(capabilities & NOMMU_MAP_COPY))
1162 				capabilities &= ~NOMMU_MAP_DIRECT;
1178 		ret = do_mmap_private(vma, region, len, capabilities);