reboot: x86: prepare reboot_mode for moving to generic kernel code

Prepare for the moving the parsing of reboot= to the generic kernel code
by making reboot_mode into a more generic form.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Miguel Boton <mboton.lkml@gmail.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 5 deletions

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 76fa1e9a2b39..f7703401d6cb 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -36,7 +36,7 @@ void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
 static const struct desc_ptr no_idt = {};
-static int reboot_mode;
+static enum reboot_mode reboot_mode;
 enum reboot_type reboot_type = BOOT_ACPI;
 int reboot_force;
 
@@ -88,11 +88,11 @@ static int __init reboot_setup(char *str)
 
                 switch (*str) {
                 case 'w':
-                        reboot_mode = 0x1234;
+                        reboot_mode = REBOOT_WARM;
                         break;
 
                 case 'c':
-                        reboot_mode = 0;
+                        reboot_mode = REBOOT_COLD;
                         break;
 
 #ifdef CONFIG_SMP
@@ -536,6 +536,7 @@ static void native_machine_emergency_restart(void)
         int i;
         int attempt = 0;
         int orig_reboot_type = reboot_type;
+        unsigned short mode;
 
         if (reboot_emergency)
                 emergency_vmx_disable_all();
@@ -543,7 +544,8 @@ static void native_machine_emergency_restart(void)
         tboot_shutdown(TB_SHUTDOWN_REBOOT);
 
         /* Tell the BIOS if we want cold or warm reboot */
-        *((unsigned short *)__va(0x472)) = reboot_mode;
+        mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0;
+        *((unsigned short *)__va(0x472)) = mode;
 
         for (;;) {
                 /* Could also try the reset bit in the Hammer NB */
@@ -585,7 +587,7 @@ static void native_machine_emergency_restart(void)
 
                 case BOOT_EFI:
                         if (efi_enabled(EFI_RUNTIME_SERVICES))
-                                efi.reset_system(reboot_mode ?
+                                efi.reset_system(reboot_mode == REBOOT_WARM ?
                                                  EFI_RESET_WARM :
                                                  EFI_RESET_COLD,
                                                  EFI_SUCCESS, 0, NULL);