Messages in this thread | | | Date | Sat, 30 Jun 2007 14:54:06 -0700 | From | "Ulrich Drepper" <> | Subject | Re: [patch 0/6] sys_indirect RFC - sys_indirect introduction |
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On 6/30/07, Davide Libenzi <davidel@xmailserver.org> wrote: > But, a __get_user(), once you scrap off all the gcc wrapping, is bacially > a move. That could even be removed, but really I don't see the reason > since it allows for a cleaner strcture definition in userland.
Don't generalize. The 4G/4G kernel, for instance, doesn't have this property. Who knows what else will come up. Anyway, two memcpy are slower than one.
> But this does not allow more than one context to be set at a time, like > the current implementation does. Ie, the current implementation allow you > to:
Of course it does. It just requires an appropriate union element. I've listed flags and sigset_t as separate union elements since I cannot think of a place where we need both extensions. Should there be one this can easily be changed. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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