[$] Read-only dynamic data

Kernel developers go to some lengths to mark read-only data so that it canbe protected by the system's memory-management unit.Memory that cannot be changed cannot be altered by an attacker to corrupt thesystem. But the kernel's mechanisms for managing read-only memory do notwork for memory that must be initialized after the initial system bootstraphas completed. A patch set from Igor Stoppaseeks to change that situation by creating a new API just forlate-initialized read-only data.