x86, realmode: header for trampoline code

Added header for trampoline code that can be used to supply
input data to it. This makes interface between real mode code
and kernel cleaner and simpler. Replaced two confusing pointers
to level4 pgt in trampoline_64.S with a single pointer to the
beginning of the page table.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-21-git-send-email-jarkko.sakkinen@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index b8c0661e2341..757c4b1d0a02 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -667,7 +667,7 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
         volatile u32 *trampoline_status =
                 (volatile u32 *) __va(real_mode_header->trampoline_status);
         /* start_ip had better be page-aligned! */
-        unsigned long start_ip = real_mode_header->trampoline_data;
+        unsigned long start_ip = real_mode_header->trampoline_start;
 
         unsigned long boot_error = 0;
         int timeout;