> > > - duplicate the destination code inside the function > > > - convert the jump to a call > > > > That all won't work for a lot of cases. > > Hm, could you give an example? Just a standard *_user exception handler. > > Well, I don't see how that's really a logical conclusion. What's special about assembler code? > But we're > probably being too vague here... Do you have any examples where you > really need to jump outside of a callable function? It's not needed, but it's an optimization to optimize icache usage. It is optional (-freorder-blocks-and-partition) In this case gcc splits the function into two (hot and cold) It's actually a nice optimization and it would be sad from stopping the kernel from using it. -Andi -- ak@xxxxxxxxxxxxxxx -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
