On Tue, 2008-01-15 at 09:44 +0100, Ingo Molnar wrote: > * Huang, Ying <[EMAIL PROTECTED]> wrote: > > > This patchset replaces boot_ioremap with a enhanced version of > > bt_ioremap and renames the bt_ioremap to early_ioremap. This reduces > > 12k from .init.data segment and increases the size of memory that can > > be re-mapped before paging_init to 64k. > > in latest x86.git#mm there's an early_ioremap() introduced as part of > the PAT series - available on both 32-bit and 64-bit. Could you take a > look at it and use that if it's OK for your purposes?
After checking the early_ioremap() implementation in arch/x86/kernel/setup_32.c, I found that it is a duplication of bt_ioremap() implementation in arch/x86/mm/ioremap_32.c. Both implementations use set_fixmap(), so they can be used only after paging_init(). The early_ioremap implementation provided in this patchset works as follow: - Enhances bt_ioremap, make it usable before paging_init() via a dedicated PTE page. - Rename bt_ioremap to early_ioremap So I think maybe we should replace the early_ioremap() implementation in PAT series with that of this series. Best Regards, Huang Ying -- 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/
