On Mon, Jan 4, 2016 at 3:02 PM, Borislav Petkov <bp@xxxxxxxxx> wrote: > On Mon, Jan 04, 2016 at 02:29:09PM -0800, Andy Lutomirski wrote: >> Josh will argue with you if he sees that :) > > Except Josh doesn't need allyesconfigs. tinyconfig's __ex_table is 2K. If we do the make-it-bigger approach, we get a really nice simplification. Screw the whole 'class' idea -- just store an offset to a handler. bool extable_handler_default(struct pt_regs *regs, unsigned int fault, unsigned long error_code, unsigned long info) { if (fault == X86_TRAP_MC) return false; ... } bool extable_handler_mc_copy(struct pt_regs *regs, unsigned int fault, unsigned long error_code, unsigned long info); bool extable_handler_getput_ex(struct pt_regs *regs, unsigned int fault, unsigned long error_code, unsigned long info); and then shove ".long extable_handler_whatever - ." into the extable entry. Major bonus points to whoever can figure out how to make extable_handler_iret work -- the current implementation of that is a real turd. (Hint: it's not clear to me that it's even possible without preserving at least part of the asm special case.) --Andy -- 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>