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    Subject[PATCH] [14/22] x86_64: Modify discover_ebda to use virtual addresses
    Date

    From: Vivek Goyal <vgoyal@in.ibm.com>


    Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
    Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
    Signed-off-by: Andi Kleen <ak@suse.de>

    ---

    arch/x86_64/kernel/setup.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    Index: linux/arch/x86_64/kernel/setup.c
    ===================================================================
    --- linux.orig/arch/x86_64/kernel/setup.c
    +++ linux/arch/x86_64/kernel/setup.c
    @@ -205,10 +205,10 @@ static void discover_ebda(void)
    * there is a real-mode segmented pointer pointing to the
    * 4K EBDA area at 0x40E
    */
    - ebda_addr = *(unsigned short *)EBDA_ADDR_POINTER;
    + ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
    ebda_addr <<= 4;

    - ebda_size = *(unsigned short *)(unsigned long)ebda_addr;
    + ebda_size = *(unsigned short *)__va(ebda_addr);

    /* Round EBDA up to pages */
    if (ebda_size == 0)
    -
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