x86, reboot: Move the real-mode reboot code to an assembly file

Move the real-mode reboot code out to an assembly file (reboot_32.S)
which is allocated using the common lowmem trampoline allocator.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>

1 files changed, 1 insertions, 11 deletions

diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 0e4f24c2a746..b929108eb58f 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -975,20 +975,10 @@ recalc:
 
 static void apm_power_off(void)
 {
-        unsigned char po_bios_call[] = {
-                0xb8, 0x00, 0x10,       /* movw  $0x1000,ax  */
-                0x8e, 0xd0,             /* movw  ax,ss       */
-                0xbc, 0x00, 0xf0,       /* movw  $0xf000,sp  */
-                0xb8, 0x07, 0x53,       /* movw  $0x5307,ax  */
-                0xbb, 0x01, 0x00,       /* movw  $0x0001,bx  */
-                0xb9, 0x03, 0x00,       /* movw  $0x0003,cx  */
-                0xcd, 0x15              /* int   $0x15       */
-        };
-
         /* Some bioses don't like being called from CPU != 0 */
         if (apm_info.realmode_power_off) {
                 set_cpus_allowed_ptr(current, cpumask_of(0));
-                machine_real_restart(po_bios_call, sizeof(po_bios_call));
+                machine_real_restart(MRR_APM);
         } else {
                 (void)set_system_power_state(APM_STATE_OFF);
         }