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

o MODPOST generates warning for i386 if kernel is compiled with
  CONFIG_RELOCATABLE=y

WARNING: vmlinux - Section mismatch: reference to .init.text:startup_32_smp
from .data between 'trampoline_data' (at offset 0xc0519cf8) and 'boot_gdt'

o trampoline code/data can go into init section is CPU hotplug is not
  enabled.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 arch/i386/kernel/trampoline.S |    5 +++++
 1 files changed, 5 insertions(+)

diff -puN arch/i386/kernel/trampoline.S~i386-fix-modpost-warning-in-smp-trampoline-code arch/i386/kernel/trampoline.S
--- a/arch/i386/kernel/trampoline.S~i386-fix-modpost-warning-in-smp-trampoline-code
+++ a/arch/i386/kernel/trampoline.S
@@ -38,6 +38,11 @@
 
 .data
 
+/* We can free up trampoline after bootup if cpu hotplug is not supported. */
+#ifndef CONFIG_HOTPLUG_CPU
+.section ".init.data","aw",@progbits
+#endif
+
 .code16
 
 ENTRY(trampoline_data)
_