This mess with arch_ methods and an ops vecor is almost unreadable. What's the problem with having something like: pmem_foo() { if (arch_has_pmem) // or sync_pmem arch_pmem_foo(); generic_pmem_foo(); } This adds a branch at runtime, but that shoudn't really be any slower than an indirect call on architectures that matter. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>