Compile in arch_platform.cpp for x86_64. The apm_init call is disabled for x86_64, APM is 32-bit only.

headers/private/kernel/arch/x86/apm.h

@@ -50,6 +50,7 @@ typedef struct apm_info {
 
 
 #ifndef _BOOT_MODE
+#ifndef __x86_64__
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -60,6 +61,7 @@ status_t apm_init(struct kernel_args *args);
 #ifdef __cplusplus
 }
 #endif
+#endif	// !__x86_64__
 #endif	// !_BOOT_MODE
 
 #endif	/* KERNEL_APM_H */

src/system/kernel/arch/x86/64/stubs.cpp

@@ -25,7 +25,6 @@
 #include <boot/kernel_args.h>
 
 #include <arch/debug.h>
-#include <arch/platform.h>
 #include <arch/vm_translation_map.h>
 #include <arch/vm.h>
 #include <arch/user_debugger.h>
@@ -244,27 +243,6 @@ arch_debug_call_with_fault_handler(cpu_ent* cpu, jmp_buf jumpBuffer,
 }
 
 
-status_t
-arch_platform_init(struct kernel_args *args)
-{
-	return B_OK;
-}
-
-
-status_t
-arch_platform_init_post_vm(struct kernel_args *args)
-{
-	return B_OK;
-}
-
-
-status_t
-arch_platform_init_post_thread(struct kernel_args *args)
-{
-	return B_OK;
-}
-
-
 status_t
 arch_rtc_init(struct kernel_args *args, struct real_time_data *data)
 {

src/system/kernel/arch/x86/Jamfile

@@ -47,7 +47,6 @@ if $(TARGET_ARCH) = x86_64 {
 		arch_commpage.cpp
 		arch_debug.cpp
 		arch_elf.cpp
-		arch_platform.cpp
 		arch_real_time_clock.cpp
 		arch_smp.cpp
 		arch_thread.cpp
@@ -90,6 +89,7 @@ local archGenericSources =
 	arch_cpu.cpp
 	arch_debug_console.cpp
 	arch_int.cpp
+	arch_platform.cpp
 	arch_vm.cpp
 	arch_vm_translation_map.cpp
 	pic.cpp

src/system/kernel/arch/x86/arch_platform.cpp

@@ -29,7 +29,10 @@ arch_platform_init_post_vm(struct kernel_args *args)
 status_t
 arch_platform_init_post_thread(struct kernel_args *args)
 {
+	// APM is not supported on x86_64.
+#ifndef __x86_64__
 	apm_init(args);
+#endif
 	return B_OK;
 }