Kernel: Simplify the Time management initialization

Kernel/Time/TimeManagement.cpp

@@ -62,10 +62,13 @@ time_t TimeManagement::epoch_time() const
     return m_epoch_time;
 }
 
-void TimeManagement::initialize(bool probe_non_legacy_hardware_timers)
+void TimeManagement::initialize()
 {
     ASSERT(!TimeManagement::initialized());
-    s_time_management = new TimeManagement(probe_non_legacy_hardware_timers);
+    if (kernel_command_line().lookup("time").value_or("modern") == "legacy")
+        s_time_management = new TimeManagement(false);
+    else
+        s_time_management = new TimeManagement(true);
 }
 time_t TimeManagement::seconds_since_boot() const
 {

Kernel/Time/TimeManagement.h

@@ -41,7 +41,7 @@ class HardwareTimer;
 class TimeManagement {
 public:
     static bool initialized();
-    static void initialize(bool probe_non_legacy_hardware_timers);
+    static void initialize();
     static TimeManagement& the();
 
     time_t epoch_time() const;

Kernel/init.cpp

@@ -85,7 +85,6 @@ namespace Kernel {
 
 [[noreturn]] static void init_stage2();
 static void setup_serial_debug();
-static void setup_time_management();
 
 VirtualConsole* tty0;
 
@@ -132,7 +131,7 @@ extern "C" [[noreturn]] void init()
 
     __stack_chk_guard = get_good_random<u32>();
 
-    setup_time_management();
+    TimeManagement::initialize();
 
     new NullDevice;
     if (!get_serial_debug())
@@ -356,24 +355,4 @@ extern "C" int __cxa_atexit(void (*)(void*), void*, void*)
     ASSERT_NOT_REACHED();
     return 0;
 }
-
-void setup_time_management()
-{
-    if (!kernel_command_line().contains("time")) {
-        TimeManagement::initialize(true);
-        return;
-    }
-    auto time = kernel_command_line().get("time");
-    if (time == "legacy") {
-        TimeManagement::initialize(false);
-        return;
-    }
-    if (time == "modern") {
-        TimeManagement::initialize(true);
-        return;
-    }
-
-    kprintf("time boot argmuent has an invalid value.\n");
-    hang();
-}
 }