[PATCH] i386: Implement machine_emergency_reboot

set_cpus_allowed is not safe in interrupt context
and disabling apics is complicated code so don't
call machine_shutdown on i386 from emergency_restart().
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/i386/kernel/reboot.c

@@ -311,10 +311,8 @@ void machine_shutdown(void)
 #endif
 }
 
-void machine_restart(char * __unused)
+void machine_emergency_restart(void)
 {
-	machine_shutdown();
-
 	if (!reboot_thru_bios) {
 		if (efi_enabled) {
 			efi.reset_system(EFI_RESET_COLD, EFI_SUCCESS, 0, NULL);
@@ -337,6 +335,12 @@ void machine_restart(char * __unused)
 	machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
 }
 
+void machine_restart(char * __unused)
+{
+	machine_shutdown();
+	machine_emergency_restart();
+}
+
 void machine_halt(void)
 {
 }

include/asm-i386/emergency-restart.h

 #ifndef _ASM_EMERGENCY_RESTART_H
 #define _ASM_EMERGENCY_RESTART_H
 
-#include <asm-generic/emergency-restart.h>
+extern void machine_emergency_restart(void);
 
 #endif /* _ASM_EMERGENCY_RESTART_H */