On 06/15/09 13:27, Linus Torvalds wrote:
On Mon, 15 Jun 2009, Jeremy Fitzhardinge wrote:We have to restore the usermode %gs somewhere...None of this is useful for user-mode return _anyway_, since you have to restore %cs/%ss too. At that point, you have to use iret.
Ah, right. I'd even looked at that at one point, when I was investigating optimising kernel->kernel exit paths (I'd decided it wasn't worth it for its own sake, since they simply don't happen that often).
J
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|