On Sat, Mar 28, 2015 at 1:39 AM, Linus Torvalds <[email protected]> wrote: > What part of "don't leak kernel data" did you have trouble understanding? > > IOW, this is a *security* issue. Stop arguing for crazy shit.
We can zero the registers instead of saving/restoring them. push/pop pair takes 1-2 cycles at best, whereas on four-issue CPUs "xor reg,reg" has throughput of four instructions at a time, often even not requiring an execution unit. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
