Kernel: Slap UNMAP_AFTER_INIT on a whole bunch of functions

There's no real system here, I just added it to various functions
that I don't believe we ever want to call after initialization
has finished.

With these changes, we're able to unmap 60 KiB of kernel text
after init. :^)

Kernel/Devices/FullDevice.cpp

@@ -32,12 +32,12 @@
 
 namespace Kernel {
 
-FullDevice::FullDevice()
+UNMAP_AFTER_INIT FullDevice::FullDevice()
     : CharacterDevice(1, 7)
 {
 }
 
-FullDevice::~FullDevice()
+UNMAP_AFTER_INIT FullDevice::~FullDevice()
 {
 }
 

Kernel/Devices/I8042Controller.cpp

@@ -33,7 +33,7 @@ namespace Kernel {
 
 static I8042Controller* s_the;
 
-void I8042Controller::initialize()
+UNMAP_AFTER_INIT void I8042Controller::initialize()
 {
     if (ACPI::Parser::the()->have_8042())
         new I8042Controller;
@@ -45,7 +45,7 @@ I8042Controller& I8042Controller::the()
     return *s_the;
 }
 
-I8042Controller::I8042Controller()
+UNMAP_AFTER_INIT I8042Controller::I8042Controller()
 {
     ASSERT(!s_the);
     s_the = this;

Kernel/Devices/NullDevice.cpp

@@ -42,12 +42,12 @@ NullDevice& NullDevice::the()
     return *s_the;
 }
 
-NullDevice::NullDevice()
+UNMAP_AFTER_INIT NullDevice::NullDevice()
     : CharacterDevice(1, 3)
 {
 }
 
-NullDevice::~NullDevice()
+UNMAP_AFTER_INIT NullDevice::~NullDevice()
 {
 }
 

Kernel/Devices/RandomDevice.cpp

@@ -29,12 +29,12 @@
 
 namespace Kernel {
 
-RandomDevice::RandomDevice()
+UNMAP_AFTER_INIT RandomDevice::RandomDevice()
     : CharacterDevice(1, 8)
 {
 }
 
-RandomDevice::~RandomDevice()
+UNMAP_AFTER_INIT RandomDevice::~RandomDevice()
 {
 }
 

Kernel/Devices/ZeroDevice.cpp

@@ -30,12 +30,12 @@
 
 namespace Kernel {
 
-ZeroDevice::ZeroDevice()
+UNMAP_AFTER_INIT ZeroDevice::ZeroDevice()
     : CharacterDevice(1, 5)
 {
 }
 
-ZeroDevice::~ZeroDevice()
+UNMAP_AFTER_INIT ZeroDevice::~ZeroDevice()
 {
 }