Messages in this thread |  | | | Date | Sun, 5 Feb 2012 16:01:31 +0900 | | Subject | Re: [PATCH] NVMe: Fix compilation on architecturs without readq/writeq | | From | Hitoshi Mitake <> |
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On Sun, Feb 5, 2012 at 15:53, Geert Uytterhoeven <geert@linux-m68k.org> wrote: > On Sat, Feb 4, 2012 at 16:39, Hitoshi Mitake <h.mitake@gmail.com> wrote: >>> I worked myself on a driver (which sadly never shipped) which had an WC >>> window and a UC window... the final write in a series had a completion bit >>> in it and would go to the UC window after setting up a whole chunk of >>> operations in the WC window (writing UC memory flushes WC memory ahead of >>> it.) >>> >>> Thus, the two-part breakdown of writeq() to the UC window had to write the >>> low half to the WC window instead. This is clearly not generic. >> >> Because of my ignorant, I don't know the words "UC window" and "WC window" >> in this context. Could you teach me? > > UN = uncached, WC = writecombining.
Thanks a lot for your teaching!
> > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds
-- Hitoshi Mitake h.mitake@gmail.com -- 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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