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    SubjectRe: [LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.
    On 12/12/06, Eric W. Biederman <ebiederm@xmission.com> wrote:
    > diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
    > index 1e6f808..2f65469 100644
    > --- a/arch/x86_64/kernel/head.S
    > +++ b/arch/x86_64/kernel/head.S
    > @@ -328,9 +328,9 @@ ENTRY(wakeup_level4_pgt)
    > .align PAGE_SIZE
    > ENTRY(boot_level4_pgt)
    > .quad phys_level3_ident_pgt | 0x007
    > - .fill 255,8,0
    > + .fill 257,8,0
    > .quad phys_level3_physmem_pgt | 0x007
    > - .fill 254,8,0
    > + .fill 252,8,0
    > /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
    > .quad phys_level3_kernel_pgt | 0x007
    >

    Good, it seems __PAGE_OFFSET used to be 0xfff800000000000
    and then 1<<40, and then 0xfff810000000000

    YH
    -
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