Kernel: Move all code into the Kernel namespace

Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/a356e481509

AK/LogStream.cpp

@@ -101,8 +101,8 @@ DebugLogStream dbg()
         stream << "\033[33;1m" << process_name_buffer << '(' << getpid() << ")\033[0m: ";
 #endif
 #if defined(__serenity__) && defined(KERNEL) && !defined(BOOTSTRAPPER)
-    if (current)
-        stream << "\033[34;1m[" << *current << "]\033[0m: ";
+    if (Kernel::current)
+        stream << "\033[34;1m[" << *Kernel::current << "]\033[0m: ";
     else
         stream << "\033[36;1m[Kernel]\033[0m: ";
 #endif

Kernel/ACPI/ACPIDynamicParser.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/ACPI/ACPIDynamicParser.h>
 #include <Kernel/ACPI/ACPIParser.h>
 
+namespace Kernel {
+
 void ACPIDynamicParser::initialize(ACPI_RAW::RSDPDescriptor20& rsdp)
 {
     if (!ACPIStaticParser::is_initialized()) {
@@ -90,4 +92,6 @@ void ACPIDynamicParser::build_namespace()
 {
     // FIXME: Implement AML Interpretation to build the ACPI namespace
     ASSERT_NOT_REACHED();
-}
+}
+
+}

Kernel/ACPI/ACPIDynamicParser.h

@@ -33,6 +33,8 @@
 #include <Kernel/VM/PhysicalPage.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 class ACPIDynamicParser final : public IRQHandler
     , ACPIStaticParser {
 public:
@@ -56,3 +58,5 @@ private:
 
     OwnPtr<Region> m_acpi_namespace;
 };
+
+}

Kernel/ACPI/ACPIParser.cpp

@@ -26,6 +26,8 @@
 
 #include <Kernel/ACPI/ACPIParser.h>
 
+namespace Kernel {
+
 static ACPIParser* s_acpi_parser;
 
 ACPIParser& ACPIParser::the()
@@ -97,4 +99,6 @@ void ACPIParser::disable_aml_interpretation()
 bool ACPIParser::is_operable()
 {
     return false;
-}
+}
+
+}

Kernel/ACPI/ACPIParser.h

@@ -33,6 +33,8 @@
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 #include <LibBareMetal/Memory/VirtualAddress.h>
 
+namespace Kernel {
+
 class ACPIParser {
 public:
     static ACPIParser& the();
@@ -54,3 +56,5 @@ protected:
     explicit ACPIParser(bool usable);
     bool m_operable;
 };
+
+}

Kernel/ACPI/ACPIStaticParser.cpp

@@ -31,6 +31,8 @@
 
 //#define ACPI_DEBUG
 
+namespace Kernel {
+
 void ACPIStaticParser::initialize(ACPI_RAW::RSDPDescriptor20& rsdp)
 {
     if (!ACPIParser::is_initialized()) {
@@ -413,3 +415,5 @@ ACPI_RAW::SDTHeader* ACPI::FixedACPIData::get_dsdt()
         return (ACPI_RAW::SDTHeader*)m_dsdt_ptr;
     }
 }
+
+}

Kernel/ACPI/ACPIStaticParser.h

@@ -29,6 +29,8 @@
 #include <ACPI/ACPIParser.h>
 #include <AK/OwnPtr.h>
 
+namespace Kernel {
+
 class ACPIStaticParser : ACPIParser {
 public:
     static void initialize(ACPI_RAW::RSDPDescriptor20& rsdp);
@@ -65,4 +67,6 @@ private:
 
     Vector<ACPI_RAW::SDTHeader*> m_aml_tables_ptrs;
     bool m_xsdt_supported;
-};
+};
+
+}

Kernel/ACPI/DMIDecoder.cpp

@@ -28,6 +28,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <LibBareMetal/StdLib.h>
 
+namespace Kernel {
+
 static DMIDecoder* s_dmi_decoder;
 
 //#define SMBIOS_DEBUG
@@ -274,3 +276,5 @@ char* DMIDecoder::get_smbios_string(SMBIOS::TableHeader&, u8)
     ASSERT_NOT_REACHED();
     return nullptr;
 }
+
+}

Kernel/ACPI/DMIDecoder.h

@@ -32,6 +32,8 @@
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 #include <LibBareMetal/Memory/VirtualAddress.h>
 
+namespace Kernel {
+
 namespace SMBIOS {
 struct [[gnu::packed]] LegacyEntryPoint32bit
 {
@@ -1418,3 +1420,5 @@ private:
 
     SinglyLinkedList<SMBIOS::TableHeader*> m_smbios_tables;
 };
+
+}

Kernel/ACPI/Definitions.h

@@ -30,6 +30,8 @@
 #include <AK/Types.h>
 #include <AK/Vector.h>
 
+namespace Kernel {
+
 namespace ACPI_RAW {
 
 struct [[gnu::packed]] RSDPDescriptor
@@ -309,3 +311,5 @@ private:
 class MADT : public SDT {
 };
 }
+
+}

Kernel/Arch/i386/APIC.cpp

@@ -47,6 +47,8 @@
 #define APIC_REG_LVT_LINT1 0x360
 #define APIC_REG_LVT_ERR 0x370
 
+namespace Kernel {
+
 extern "C" void apic_spurious_interrupt_entry();
 
 asm(
@@ -214,3 +216,5 @@ void enable(u32 cpu)
 }
 
 }
+
+}

Kernel/Arch/i386/APIC.h

@@ -28,9 +28,13 @@
 
 #include <AK/Types.h>
 
+namespace Kernel {
+
 namespace APIC {
 
 bool init();
 void enable(u32 cpu);
 
 }
+
+}

Kernel/Arch/i386/CPU.cpp

@@ -37,6 +37,8 @@
 
 //#define PAGE_FAULT_DEBUG
 
+namespace Kernel {
+
 struct [[gnu::packed]] DescriptorTablePointer
 {
     u16 limit;
@@ -553,24 +555,6 @@ void handle_irq(RegisterState regs)
     PIC::eoi(irq);
 }
 
-#ifdef DEBUG
-void __assertion_failed(const char* msg, const char* file, unsigned line, const char* func)
-{
-    asm volatile("cli");
-    kprintf("ASSERTION FAILED: %s\n%s:%u in %s\n", msg, file, line, func);
-
-    // Switch back to the current process's page tables if there are any.
-    // Otherwise stack walking will be a disaster.
-    if (current)
-        MM.enter_process_paging_scope(current->process());
-
-    dump_backtrace();
-    asm volatile("hlt");
-    for (;;)
-        ;
-}
-#endif
-
 void sse_init()
 {
     asm volatile(
@@ -725,3 +709,23 @@ void write_cr3(u32 cr3)
     asm volatile("movl %%eax, %%cr3" ::"a"(cr3)
                  : "memory");
 }
+
+}
+
+#ifdef DEBUG
+void __assertion_failed(const char* msg, const char* file, unsigned line, const char* func)
+{
+    asm volatile("cli");
+    kprintf("ASSERTION FAILED: %s\n%s:%u in %s\n", msg, file, line, func);
+
+    // Switch back to the current process's page tables if there are any.
+    // Otherwise stack walking will be a disaster.
+    if (Kernel::current)
+        MM.enter_process_paging_scope(Kernel::current->process());
+
+    Kernel::dump_backtrace();
+    asm volatile("hlt");
+    for (;;)
+        ;
+}
+#endif

Kernel/Arch/i386/CPU.h

@@ -34,6 +34,8 @@
 #define PAGE_SIZE 4096
 #define PAGE_MASK ((uintptr_t)0xfffff000u)
 
+namespace Kernel {
+
 class MemoryManager;
 class PageDirectory;
 class PageTableEntry;
@@ -589,3 +591,5 @@ public:
 private:
     u32 m_flags;
 };
+
+}

Kernel/Arch/i386/PIC.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/Arch/i386/PIC.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 // The slave 8259 is connected to the master's IRQ2 line.
 // This is really only to enhance clarity.
 #define SLAVE_INDEX 2
@@ -137,3 +139,5 @@ u16 get_irr()
 }
 
 }
+
+}

Kernel/Arch/i386/PIC.h

@@ -28,14 +28,16 @@
 
 #include <AK/Types.h>
 
+namespace Kernel {
+
 namespace PIC {
 
-void enable(u8 number);
-void disable(u8 number);
-void eoi(u8 number);
-void initialize();
-u16 get_isr();
-u16 get_irr();
+    void enable(u8 number);
+    void disable(u8 number);
+    void eoi(u8 number);
+    void initialize();
+    u16 get_isr();
+    u16 get_irr();
 
 }
 
@@ -50,3 +52,5 @@ public:
 private:
     u8 m_irq { 0 };
 };
+
+}

Kernel/Arch/i386/PIT.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/Scheduler.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 #define IRQ_TIMER 0
 
 extern "C" void timer_interrupt_entry();
@@ -105,3 +107,5 @@ void initialize()
 }
 
 }
+
+}

Kernel/Arch/i386/PIT.h

@@ -28,6 +28,8 @@
 
 #include <AK/Types.h>
 
+namespace Kernel {
+
 #define TICKS_PER_SECOND 1000
 /* Timer related ports */
 #define TIMER0_CTL 0x40
@@ -56,3 +58,5 @@ u32 ticks_this_second();
 u32 seconds_since_boot();
 
 }
+
+}

Kernel/Devices/BXVGADevice.cpp

@@ -33,6 +33,8 @@
 #include <LibC/errno_numbers.h>
 #include <LibC/sys/ioctl_numbers.h>
 
+namespace Kernel {
+
 #define MAX_RESOLUTION_WIDTH 4096
 #define MAX_RESOLUTION_HEIGHT 2160
 
@@ -182,3 +184,5 @@ int BXVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
         return -EINVAL;
     };
 }
+
+}

Kernel/Devices/BXVGADevice.h

@@ -31,6 +31,8 @@
 #include <Kernel/Devices/BlockDevice.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 class BXVGADevice final : public BlockDevice {
     AK_MAKE_ETERNAL
 public:
@@ -62,3 +64,5 @@ private:
     int m_framebuffer_height { 0 };
     int m_y_offset { 0 };
 };
+
+}

Kernel/Devices/BlockDevice.cpp

@@ -26,6 +26,8 @@
 
 #include <Kernel/Devices/BlockDevice.h>
 
+namespace Kernel {
+
 BlockDevice::~BlockDevice()
 {
 }
@@ -59,3 +61,5 @@ bool BlockDevice::write_raw(u32 offset, unsigned length, const u8* in)
     ASSERT(end_block <= 0xffffffff);
     return write_blocks(first_block, end_block - first_block, in);
 }
+
+}

Kernel/Devices/BlockDevice.h

@@ -28,6 +28,8 @@
 
 #include <Kernel/Devices/Device.h>
 
+namespace Kernel {
+
 class BlockDevice : public Device {
 public:
     virtual ~BlockDevice() override;
@@ -55,3 +57,5 @@ private:
 
     size_t m_block_size { 0 };
 };
+
+}

Kernel/Devices/CharacterDevice.cpp

@@ -26,6 +26,10 @@
 
 #include <Kernel/Devices/CharacterDevice.h>
 
+namespace Kernel {
+
 CharacterDevice::~CharacterDevice()
 {
 }
+
+}

Kernel/Devices/CharacterDevice.h

@@ -28,6 +28,8 @@
 
 #include <Kernel/Devices/Device.h>
 
+namespace Kernel {
+
 class CharacterDevice : public Device {
 public:
     virtual ~CharacterDevice() override;
@@ -41,3 +43,5 @@ protected:
 private:
     virtual bool is_character_device() const final { return true; }
 };
+
+}

Kernel/Devices/DebugLogDevice.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/Devices/DebugLogDevice.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 static DebugLogDevice* s_the;
 
 DebugLogDevice& DebugLogDevice::the()
@@ -51,3 +53,5 @@ ssize_t DebugLogDevice::write(FileDescription&, const u8* data, ssize_t data_siz
         IO::out8(0xe9, data[i]);
     return data_size;
 }
+
+}

Kernel/Devices/DebugLogDevice.h

@@ -26,6 +26,8 @@
 
 #include <Kernel/Devices/CharacterDevice.h>
 
+namespace Kernel {
+
 class DebugLogDevice final : public CharacterDevice {
 public:
     DebugLogDevice();
@@ -41,3 +43,5 @@ private:
     virtual bool can_read(const FileDescription&) const override { return true; }
     virtual const char* class_name() const override { return "DebugLogDevice"; }
 };
+
+}

Kernel/Devices/Device.cpp

@@ -28,6 +28,8 @@
 #include <Kernel/FileSystem/InodeMetadata.h>
 #include <LibC/errno_numbers.h>
 
+namespace Kernel {
+
 static HashMap<u32, Device*>* s_all_devices;
 
 HashMap<u32, Device*>& Device::all_devices()
@@ -78,3 +80,5 @@ String Device::absolute_path(const FileDescription&) const
 {
     return absolute_path();
 }
+
+}

Kernel/Devices/Device.h

@@ -39,6 +39,8 @@
 #include <Kernel/FileSystem/File.h>
 #include <Kernel/UnixTypes.h>
 
+namespace Kernel {
+
 class Device : public File {
 public:
     virtual ~Device() override;
@@ -71,3 +73,5 @@ private:
     uid_t m_uid { 0 };
     gid_t m_gid { 0 };
 };
+
+}

Kernel/Devices/DiskPartition.cpp

@@ -28,6 +28,8 @@
 
 // #define OFFD_DEBUG
 
+namespace Kernel {
+
 NonnullRefPtr<DiskPartition> DiskPartition::create(BlockDevice& device, unsigned block_offset, unsigned block_limit)
 {
     return adopt(*new DiskPartition(device, block_offset, block_limit));
@@ -67,3 +69,5 @@ const char* DiskPartition::class_name() const
 {
     return "DiskPartition";
 }
+
+}

Kernel/Devices/DiskPartition.h

@@ -29,6 +29,8 @@
 #include <AK/RefPtr.h>
 #include <Kernel/Devices/BlockDevice.h>
 
+namespace Kernel {
+
 class DiskPartition final : public BlockDevice {
 public:
     static NonnullRefPtr<DiskPartition> create(BlockDevice&, unsigned block_offset, unsigned block_limit);
@@ -52,3 +54,5 @@ private:
     unsigned m_block_offset;
     unsigned m_block_limit;
 };
+
+}

Kernel/Devices/EBRPartitionTable.cpp

@@ -29,6 +29,8 @@
 
 #define EBR_DEBUG
 
+namespace Kernel {
+
 EBRPartitionTable::EBRPartitionTable(NonnullRefPtr<BlockDevice> device)
     : m_device(move(device))
 {
@@ -194,3 +196,5 @@ RefPtr<DiskPartition> EBRPartitionTable::partition(unsigned index)
         return get_non_extended_partition(index - m_ebr_chained_extensions_count);
     return get_non_extended_partition(index);
 }
+
+}

Kernel/Devices/EBRPartitionTable.h

@@ -31,6 +31,8 @@
 #include <Kernel/Devices/DiskPartition.h>
 #include <Kernel/Devices/MBRPartitionTable.h>
 
+namespace Kernel {
+
 struct [[gnu::packed]] EBRPartitionExtension
 {
     u8 unused_area[446];
@@ -65,3 +67,5 @@ private:
     u8 m_cached_mbr_header[512];
     u8 m_cached_ebr_header[512];
 };
+
+}

Kernel/Devices/FloppyDiskDevice.cpp

@@ -31,6 +31,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 // Uncomment me for a LOT of output
 //#define FLOPPY_DEBUG
 
@@ -561,3 +563,5 @@ void FloppyDiskDevice::initialize()
     kprintf("fdc: fd%d initialised succesfully!\n", is_slave() ? 1 : 0);
 #endif
 }
+
+}

Kernel/Devices/FloppyDiskDevice.h

@@ -104,6 +104,8 @@
 #include <Kernel/VM/PhysicalPage.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 struct FloppyControllerCommand {
     u8 cmd;         // Command to send to the controller
     u8 numParams;   // Number of parameters to send to the drive
@@ -216,3 +218,5 @@ private:
 
     u8 m_controller_version { 0 };
 };
+
+}

Kernel/Devices/FullDevice.cpp

@@ -28,6 +28,8 @@
 #include <AK/StdLibExtras.h>
 #include <LibC/errno_numbers.h>
 
+namespace Kernel {
+
 FullDevice::FullDevice()
     : CharacterDevice(1, 7)
 {
@@ -55,3 +57,5 @@ ssize_t FullDevice::write(FileDescription&, const u8*, ssize_t size)
         return 0;
     return -ENOSPC;
 }
+
+}

Kernel/Devices/FullDevice.h

@@ -28,6 +28,8 @@
 
 #include "CharacterDevice.h"
 
+namespace Kernel {
+
 class FullDevice final : public CharacterDevice {
     AK_MAKE_ETERNAL
 public:
@@ -42,3 +44,5 @@ private:
     virtual bool can_write(const FileDescription&) const override { return true; }
     virtual const char* class_name() const override { return "FullDevice"; }
 };
+
+}

Kernel/Devices/GPTPartitionTable.cpp

@@ -29,6 +29,8 @@
 
 #define GPT_DEBUG
 
+namespace Kernel {
+
 GPTPartitionTable::GPTPartitionTable(BlockDevice& device)
     : m_device(move(device))
 {
@@ -99,3 +101,5 @@ RefPtr<DiskPartition> GPTPartitionTable::partition(unsigned index)
 #endif
     return DiskPartition::create(m_device, entry.first_lba[0], entry.last_lba[0]);
 }
+
+}

Kernel/Devices/GPTPartitionTable.h

@@ -31,6 +31,8 @@
 #include <AK/Vector.h>
 #include <Kernel/Devices/DiskPartition.h>
 
+namespace Kernel {
+
 #define GPT_SIGNATURE2 0x54524150
 #define GPT_SIGNATURE 0x20494645
 #define BytesPerSector 512
@@ -85,3 +87,5 @@ private:
 
     u8 m_cached_header[512];
 };
+
+}

Kernel/Devices/KeyboardDevice.cpp

@@ -34,6 +34,8 @@
 
 //#define KEYBOARD_DEBUG
 
+namespace Kernel {
+
 #define IRQ_KEYBOARD 1
 #define I8042_BUFFER 0x60
 #define I8042_STATUS 0x64
@@ -619,3 +621,5 @@ void KeyboardDevice::set_maps(const char* n_map, const char* n_shift_map, const
         altgr_map[i] = n_altgr_map[i];
     }
 }
+
+}

Kernel/Devices/KeyboardDevice.h

@@ -33,6 +33,8 @@
 #include <AK/Types.h>
 #include <Kernel/Devices/CharacterDevice.h>
 
+namespace Kernel {
+
 class KeyboardClient;
 
 class KeyboardDevice final : public IRQHandler
@@ -84,3 +86,5 @@ public:
     virtual ~KeyboardClient();
     virtual void on_key_pressed(KeyboardDevice::Event) = 0;
 };
+
+}

Kernel/Devices/MBRPartitionTable.cpp

@@ -29,6 +29,8 @@
 
 #define MBR_DEBUG
 
+namespace Kernel {
+
 MBRPartitionTable::MBRPartitionTable(NonnullRefPtr<BlockDevice> device)
     : m_device(move(device))
 {
@@ -107,3 +109,5 @@ RefPtr<DiskPartition> MBRPartitionTable::partition(unsigned index)
 
     return DiskPartition::create(m_device, entry.offset, (entry.offset + entry.length));
 }
+
+}

Kernel/Devices/MBRPartitionTable.h

@@ -30,6 +30,8 @@
 #include <AK/Vector.h>
 #include <Kernel/Devices/DiskPartition.h>
 
+namespace Kernel {
+
 #define MBR_SIGNATURE 0xaa55
 #define MBR_PROTECTIVE 0xEE
 #define EBR_CHS_CONTAINER 0x05
@@ -76,3 +78,5 @@ private:
 
     u8 m_cached_header[512];
 };
+
+}

Kernel/Devices/MBVGADevice.cpp

@@ -31,6 +31,8 @@
 #include <LibC/errno_numbers.h>
 #include <LibC/sys/ioctl_numbers.h>
 
+namespace Kernel {
+
 static MBVGADevice* s_the;
 
 MBVGADevice& MBVGADevice::the()
@@ -109,3 +111,5 @@ int MBVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
         return -EINVAL;
     };
 }
+
+}

Kernel/Devices/MBVGADevice.h

@@ -31,6 +31,8 @@
 #include <Kernel/Devices/BlockDevice.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 class MBVGADevice final : public BlockDevice {
     AK_MAKE_ETERNAL
 public:
@@ -57,3 +59,5 @@ private:
     int m_framebuffer_width { 0 };
     int m_framebuffer_height { 0 };
 };
+
+}

Kernel/Devices/NullDevice.cpp

@@ -27,6 +27,8 @@
 #include "NullDevice.h"
 #include <AK/StdLibExtras.h>
 
+namespace Kernel {
+
 static NullDevice* s_the;
 
 NullDevice& NullDevice::the()
@@ -59,3 +61,5 @@ ssize_t NullDevice::write(FileDescription&, const u8*, ssize_t buffer_size)
 {
     return min(PAGE_SIZE, buffer_size);
 }
+
+}

Kernel/Devices/NullDevice.h

@@ -28,6 +28,8 @@
 
 #include "CharacterDevice.h"
 
+namespace Kernel {
+
 class NullDevice final : public CharacterDevice {
     AK_MAKE_ETERNAL
 public:
@@ -44,3 +46,5 @@ private:
     virtual bool can_read(const FileDescription&) const override;
     virtual const char* class_name() const override { return "NullDevice"; }
 };
+
+}

Kernel/Devices/PATAChannel.cpp

@@ -32,6 +32,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 #define PATA_PRIMARY_IRQ 14
 #define PATA_SECONDARY_IRQ 15
 
@@ -533,3 +535,5 @@ bool PATAChannel::ata_write_sectors(u32 start_sector, u16 count, const u8* inbuf
 
     return !m_device_error;
 }
+
+}

Kernel/Devices/PATAChannel.h

@@ -45,6 +45,8 @@
 #include <Kernel/WaitQueue.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 struct PhysicalRegionDescriptor {
     PhysicalAddress offset;
     u16 size { 0 };
@@ -100,3 +102,5 @@ private:
     RefPtr<PATADiskDevice> m_master;
     RefPtr<PATADiskDevice> m_slave;
 };
+
+}

Kernel/Devices/PATADiskDevice.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/Devices/PATADiskDevice.h>
 #include <Kernel/FileSystem/FileDescription.h>
 
+namespace Kernel {
+
 NonnullRefPtr<PATADiskDevice> PATADiskDevice::create(PATAChannel& channel, DriveType type, int major, int minor)
 {
     return adopt(*new PATADiskDevice(channel, type, major, minor));
@@ -187,3 +189,5 @@ bool PATADiskDevice::is_slave() const
 {
     return m_drive_type == DriveType::Slave;
 }
+
+}

Kernel/Devices/PATADiskDevice.h

@@ -34,6 +34,8 @@
 #include <Kernel/IRQHandler.h>
 #include <Kernel/Lock.h>
 
+namespace Kernel {
+
 class PATAChannel;
 
 class PATADiskDevice final : public BlockDevice {
@@ -86,3 +88,5 @@ private:
 
     PATAChannel& m_channel;
 };
+
+}

Kernel/Devices/PS2MouseDevice.cpp

@@ -28,6 +28,8 @@
 #include <Kernel/Devices/VMWareBackdoor.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 #define IRQ_MOUSE 12
 #define I8042_BUFFER 0x60
 #define I8042_STATUS 0x64
@@ -383,3 +385,5 @@ ssize_t PS2MouseDevice::write(FileDescription&, const u8*, ssize_t)
 {
     return 0;
 }
+
+}

Kernel/Devices/PS2MouseDevice.h

@@ -31,6 +31,8 @@
 #include <Kernel/IRQHandler.h>
 #include <Kernel/MousePacket.h>
 
+namespace Kernel {
+
 class PS2MouseDevice final : public IRQHandler
     , public CharacterDevice {
 public:
@@ -71,3 +73,5 @@ private:
     u8 m_data[4];
     bool m_has_wheel { false };
 };
+
+}

Kernel/Devices/RandomDevice.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/Devices/RandomDevice.h>
 #include <Kernel/Random.h>
 
+namespace Kernel {
+
 RandomDevice::RandomDevice()
     : CharacterDevice(1, 8)
 {
@@ -52,3 +54,5 @@ ssize_t RandomDevice::write(FileDescription&, const u8*, ssize_t size)
     // FIXME: Use input for entropy? I guess that could be a neat feature?
     return min(PAGE_SIZE, size);
 }
+
+}

Kernel/Devices/RandomDevice.h

@@ -28,6 +28,8 @@
 
 #include "CharacterDevice.h"
 
+namespace Kernel {
+
 class RandomDevice final : public CharacterDevice {
     AK_MAKE_ETERNAL
 public:
@@ -42,3 +44,5 @@ private:
     virtual bool can_write(const FileDescription&) const override { return true; }
     virtual const char* class_name() const override { return "RandomDevice"; }
 };
+
+}

Kernel/Devices/SB16.cpp

@@ -32,6 +32,8 @@
 
 //#define SB16_DEBUG
 
+namespace Kernel {
+
 enum class SampleFormat : u8 {
     Signed = 0x10,
     Stereo = 0x20,
@@ -215,3 +217,5 @@ ssize_t SB16::write(FileDescription&, const u8* data, ssize_t length)
     wait_for_irq();
     return length;
 }
+
+}

Kernel/Devices/SB16.h

@@ -26,13 +26,14 @@
 
 #pragma once
 
-#include <AK/CircularQueue.h>
 #include <Kernel/Devices/CharacterDevice.h>
 #include <Kernel/IRQHandler.h>
 #include <Kernel/VM/PhysicalPage.h>
 #include <Kernel/WaitQueue.h>
 #include <LibBareMetal/Memory/PhysicalAddress.h>
 
+namespace Kernel {
+
 class SB16;
 
 class SB16 final : public IRQHandler
@@ -68,3 +69,5 @@ private:
 
     WaitQueue m_irq_queue;
 };
+
+}

Kernel/Devices/SerialDevice.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/Devices/SerialDevice.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 SerialDevice::SerialDevice(int base_addr, unsigned minor)
     : CharacterDevice(4, minor)
     , m_base_addr(base_addr)
@@ -134,3 +136,5 @@ char SerialDevice::get_line_status() const
 {
     return IO::in8(m_base_addr + 5);
 }
+
+}

Kernel/Devices/SerialDevice.h

@@ -26,6 +26,8 @@
 
 #include <Kernel/Devices/CharacterDevice.h>
 
+namespace Kernel {
+
 #define SERIAL_COM1_ADDR 0x3F8
 #define SERIAL_COM2_ADDR 0x2F8
 #define SERIAL_COM3_ADDR 0x3E8
@@ -144,3 +146,5 @@ private:
     bool m_break_enable;
     char m_modem_control;
 };
+
+}

Kernel/Devices/VMWareBackdoor.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/Devices/VMWareBackdoor.h>
 #include <LibBareMetal/IO.h>
 
+namespace Kernel {
+
 #define VMWARE_CMD_GETVERSION 0x0a
 
 #define VMMOUSE_READ_ID 0x45414552
@@ -202,3 +204,5 @@ void VMWareBackdoor::send(VMWareCommand& command)
 #endif
     }
 }
+
+}

Kernel/Devices/VMWareBackdoor.h

@@ -28,6 +28,8 @@
 
 #include <AK/Types.h>
 
+namespace Kernel {
+
 #define VMMOUSE_GETVERSION 10
 #define VMMOUSE_DATA 39
 #define VMMOUSE_STATUS 40
@@ -73,3 +75,5 @@ private:
     bool m_supported;
     bool m_vmmouse_absolute { false };
 };
+
+}

Kernel/Devices/ZeroDevice.cpp

@@ -27,6 +27,8 @@
 #include "ZeroDevice.h"
 #include <AK/StdLibExtras.h>
 
+namespace Kernel {
+
 ZeroDevice::ZeroDevice()
     : CharacterDevice(1, 5)
 {
@@ -52,3 +54,5 @@ ssize_t ZeroDevice::write(FileDescription&, const u8*, ssize_t size)
 {
     return min(PAGE_SIZE, size);
 }
+
+}

Kernel/Devices/ZeroDevice.h

@@ -28,6 +28,8 @@
 
 #include "CharacterDevice.h"
 
+namespace Kernel {
+
 class ZeroDevice final : public CharacterDevice {
     AK_MAKE_ETERNAL
 public:
@@ -42,3 +44,5 @@ private:
     virtual bool can_write(const FileDescription&) const override { return true; }
     virtual const char* class_name() const override { return "ZeroDevice"; }
 };
+
+}

Kernel/DoubleBuffer.cpp

@@ -26,6 +26,8 @@
 
 #include <Kernel/DoubleBuffer.h>
 
+namespace Kernel {
+
 inline void DoubleBuffer::compute_lockfree_metadata()
 {
     InterruptDisabler disabler;
@@ -85,3 +87,5 @@ ssize_t DoubleBuffer::read(u8* data, ssize_t size)
     compute_lockfree_metadata();
     return nread;
 }
+
+}

Kernel/DoubleBuffer.h

@@ -30,6 +30,8 @@
 #include <Kernel/KBuffer.h>
 #include <Kernel/Lock.h>
 
+namespace Kernel {
+
 class DoubleBuffer {
 public:
     explicit DoubleBuffer(size_t capacity = 65536);
@@ -62,3 +64,5 @@ private:
     bool m_empty { true };
     mutable Lock m_lock { "DoubleBuffer" };
 };
+
+}

Kernel/FileSystem/Custody.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/Lock.h>
 
+namespace Kernel {
+
 static Lockable<InlineLinkedList<Custody>>& all_custodies()
 {
     static Lockable<InlineLinkedList<Custody>>* list;
@@ -109,3 +111,5 @@ void Custody::did_rename(Badge<VFS>, const String& name)
 {
     m_name = name;
 }
+
+}

Kernel/FileSystem/Custody.h

@@ -32,6 +32,8 @@
 #include <AK/RefPtr.h>
 #include <AK/String.h>
 
+namespace Kernel {
+
 class Inode;
 class VFS;
 
@@ -79,3 +81,5 @@ private:
     bool m_mounted_on { false };
     int m_mount_flags { 0 };
 };
+
+}

Kernel/FileSystem/DevPtsFS.cpp

@@ -29,6 +29,8 @@
 #include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/TTY/SlavePTY.h>
 
+namespace Kernel {
+
 NonnullRefPtr<DevPtsFS> DevPtsFS::create()
 {
     return adopt(*new DevPtsFS);
@@ -206,3 +208,5 @@ KResult DevPtsFSInode::chown(uid_t, gid_t)
 {
     return KResult(-EPERM);
 }
+
+}

Kernel/FileSystem/DevPtsFS.h

@@ -30,6 +30,8 @@
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/Inode.h>
 
+namespace Kernel {
+
 class SlavePTY;
 class DevPtsFSInode;
 
@@ -57,6 +59,7 @@ private:
 
 class DevPtsFSInode final : public Inode {
     friend class DevPtsFS;
+
 public:
     virtual ~DevPtsFSInode() override;
 
@@ -78,3 +81,5 @@ private:
 
     InodeMetadata m_metadata;
 };
+
+}

Kernel/FileSystem/DiskBackedFileSystem.cpp

@@ -32,6 +32,8 @@
 
 //#define DBFS_DEBUG
 
+namespace Kernel {
+
 struct CacheEntry {
     time_t timestamp { 0 };
     u32 block_index { 0 };
@@ -240,3 +242,5 @@ DiskCache& DiskBackedFS::cache() const
         m_cache = make<DiskCache>(const_cast<DiskBackedFS&>(*this));
     return *m_cache;
 }
+
+}

Kernel/FileSystem/DiskBackedFileSystem.h

@@ -29,6 +29,8 @@
 #include "FileSystem.h"
 #include <AK/ByteBuffer.h>
 
+namespace Kernel {
+
 class DiskCache;
 
 class DiskBackedFS : public FS {
@@ -60,3 +62,5 @@ private:
     NonnullRefPtr<BlockDevice> m_device;
     mutable OwnPtr<DiskCache> m_cache;
 };
+
+}

Kernel/FileSystem/Ext2FileSystem.cpp

@@ -36,6 +36,8 @@
 
 //#define EXT2_DEBUG
 
+namespace Kernel {
+
 static const size_t max_link_count = 65535;
 static const size_t max_block_size = 4096;
 static const ssize_t max_inline_symlink_length = 60;
@@ -573,7 +575,7 @@ InodeMetadata Ext2FSInode::metadata() const
     metadata.block_size = fs().block_size();
     metadata.block_count = m_raw_inode.i_blocks;
 
-    if (::is_character_device(m_raw_inode.i_mode) || ::is_block_device(m_raw_inode.i_mode)) {
+    if (Kernel::is_character_device(m_raw_inode.i_mode) || Kernel::is_block_device(m_raw_inode.i_mode)) {
         unsigned dev = m_raw_inode.i_block[0];
         if (!dev)
             dev = m_raw_inode.i_block[1];
@@ -1646,3 +1648,5 @@ KResult Ext2FS::prepare_to_unmount() const
     m_inode_cache.clear();
     return KSuccess;
 }
+
+}

Kernel/FileSystem/Ext2FileSystem.h

@@ -27,16 +27,18 @@
 #pragma once
 
 #include <AK/Bitmap.h>
-#include <Kernel/KBuffer.h>
 #include <Kernel/FileSystem/DiskBackedFileSystem.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/ext2_fs.h>
+#include <Kernel/KBuffer.h>
 #include <Kernel/UnixTypes.h>
 
 struct ext2_group_desc;
 struct ext2_inode;
 struct ext2_super_block;
 
+namespace Kernel {
+
 class Ext2FS;
 
 class Ext2FSInode final : public Inode {
@@ -46,8 +48,8 @@ public:
     virtual ~Ext2FSInode() override;
 
     size_t size() const { return m_raw_inode.i_size; }
-    bool is_symlink() const { return ::is_symlink(m_raw_inode.i_mode); }
-    bool is_directory() const { return ::is_directory(m_raw_inode.i_mode); }
+    bool is_symlink() const { return Kernel::is_symlink(m_raw_inode.i_mode); }
+    bool is_directory() const { return Kernel::is_directory(m_raw_inode.i_mode); }
 
     // ^Inode (RefCounted magic)
     virtual void one_ref_left() override;
@@ -171,7 +173,8 @@ private:
         CachedBitmap(BlockIndex bi, KBuffer&& buf)
             : bitmap_block_index(bi)
             , buffer(move(buf))
-        {}
+        {
+        }
         BlockIndex bitmap_block_index { 0 };
         bool dirty { false };
         KBuffer buffer;
@@ -192,3 +195,5 @@ inline const Ext2FS& Ext2FSInode::fs() const
 {
     return static_cast<const Ext2FS&>(Inode::fs());
 }
+
+}

Kernel/FileSystem/FIFO.cpp

@@ -34,6 +34,8 @@
 
 //#define FIFO_DEBUG
 
+namespace Kernel {
+
 Lockable<HashTable<FIFO*>>& all_fifos()
 {
     static Lockable<HashTable<FIFO*>>* s_table;
@@ -143,3 +145,5 @@ String FIFO::absolute_path(const FileDescription&) const
 {
     return String::format("fifo:%u", m_fifo_id);
 }
+
+}

Kernel/FileSystem/FIFO.h

@@ -30,6 +30,8 @@
 #include <Kernel/FileSystem/File.h>
 #include <Kernel/UnixTypes.h>
 
+namespace Kernel {
+
 class FileDescription;
 
 class FIFO final : public File {
@@ -70,3 +72,5 @@ private:
 
     int m_fifo_id { 0 };
 };
+
+}

Kernel/FileSystem/File.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/FileSystem/File.h>
 #include <Kernel/FileSystem/FileDescription.h>
 
+namespace Kernel {
+
 File::File()
 {
 }
@@ -56,3 +58,5 @@ KResultOr<Region*> File::mmap(Process&, FileDescription&, VirtualAddress, size_t
 {
     return KResult(-ENODEV);
 }
+
+}

Kernel/FileSystem/File.h

@@ -34,6 +34,8 @@
 #include <Kernel/UnixTypes.h>
 #include <LibBareMetal/Memory/VirtualAddress.h>
 
+namespace Kernel {
+
 class FileDescription;
 class Process;
 class Region;
@@ -102,3 +104,5 @@ public:
 protected:
     File();
 };
+
+}

Kernel/FileSystem/FileDescription.cpp

@@ -40,6 +40,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <LibC/errno_numbers.h>
 
+namespace Kernel {
+
 NonnullRefPtr<FileDescription> FileDescription::create(Custody& custody)
 {
     auto description = adopt(*new FileDescription(InodeFile::create(custody.inode())));
@@ -170,7 +172,6 @@ ByteBuffer FileDescription::read_entire_file()
     return m_inode->read_entire(this);
 }
 
-
 ssize_t FileDescription::get_dir_entries(u8* buffer, ssize_t size)
 {
     LOCKER(m_lock);
@@ -340,3 +341,5 @@ KResult FileDescription::chown(uid_t uid, gid_t gid)
     LOCKER(m_lock);
     return m_file->chown(uid, gid);
 }
+
+}

Kernel/FileSystem/FileDescription.h

@@ -28,22 +28,23 @@
 
 #include <AK/Badge.h>
 #include <AK/ByteBuffer.h>
-#include <AK/CircularQueue.h>
 #include <AK/RefCounted.h>
 #include <Kernel/FileSystem/FIFO.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/InodeMetadata.h>
 #include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/KBuffer.h>
-#include <Kernel/Net/Socket.h>
 #include <LibBareMetal/Memory/VirtualAddress.h>
 
+namespace Kernel {
+
+class CharacterDevice;
 class File;
-class TTY;
 class MasterPTY;
 class Process;
 class Region;
-class CharacterDevice;
+class Socket;
+class TTY;
 
 class FileDescription : public RefCounted<FileDescription> {
 public:
@@ -161,3 +162,5 @@ private:
 
     Lock m_lock { "FileDescription" };
 };
+
+}

Kernel/FileSystem/FileSystem.cpp

@@ -33,6 +33,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <LibC/errno_numbers.h>
 
+namespace Kernel {
+
 static u32 s_lastFileSystemID;
 static HashMap<u32, FS*>* s_fs_map;
 
@@ -111,3 +113,5 @@ void FS::set_block_size(int block_size)
         return;
     m_block_size = block_size;
 }
+
+}

Kernel/FileSystem/FileSystem.h

@@ -41,6 +41,8 @@
 #include <Kernel/Lock.h>
 #include <Kernel/UnixTypes.h>
 
+namespace Kernel {
+
 static const u32 mepoch = 476763780;
 
 class Inode;
@@ -122,11 +124,13 @@ inline bool InodeIdentifier::is_root_inode() const
     return (*this) == fs()->root_inode();
 }
 
+}
+
 namespace AK {
 
 template<>
-struct Traits<InodeIdentifier> : public GenericTraits<InodeIdentifier> {
-    static unsigned hash(const InodeIdentifier& inode) { return pair_int_hash(inode.fsid(), inode.index()); }
+struct Traits<Kernel::InodeIdentifier> : public GenericTraits<Kernel::InodeIdentifier> {
+    static unsigned hash(const Kernel::InodeIdentifier& inode) { return pair_int_hash(inode.fsid(), inode.index()); }
 };
 
 }

Kernel/FileSystem/Inode.cpp

@@ -33,6 +33,8 @@
 #include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/FileSystem/Custody.h>
 
+namespace Kernel {
+
 InlineLinkedList<Inode>& all_inodes()
 {
     static InlineLinkedList<Inode>* list;
@@ -213,3 +215,5 @@ void Inode::set_metadata_dirty(bool metadata_dirty)
         }
     }
 }
+
+}

Kernel/FileSystem/Inode.h

@@ -26,10 +26,10 @@
 
 #pragma once
 
-#include <AK/String.h>
 #include <AK/Function.h>
 #include <AK/InlineLinkedList.h>
 #include <AK/RefCounted.h>
+#include <AK/String.h>
 #include <AK/WeakPtr.h>
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/InodeIdentifier.h>
@@ -37,6 +37,8 @@
 #include <Kernel/KResult.h>
 #include <Kernel/Lock.h>
 
+namespace Kernel {
+
 class FileDescription;
 class InodeVMObject;
 class InodeWatcher;
@@ -132,3 +134,5 @@ private:
     HashTable<InodeWatcher*> m_watchers;
     bool m_metadata_dirty { false };
 };
+
+}

Kernel/FileSystem/InodeFile.cpp

@@ -30,6 +30,8 @@
 #include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/Process.h>
 
+namespace Kernel {
+
 InodeFile::InodeFile(NonnullRefPtr<Inode>&& inode)
     : m_inode(move(inode))
 {
@@ -94,3 +96,5 @@ KResult InodeFile::chmod(mode_t mode)
 {
     return VFS::the().chmod(*m_inode, mode);
 }
+
+}

Kernel/FileSystem/InodeFile.h

@@ -28,6 +28,8 @@
 
 #include <Kernel/FileSystem/File.h>
 
+namespace Kernel {
+
 class Inode;
 
 class InodeFile final : public File {
@@ -64,3 +66,5 @@ private:
     explicit InodeFile(NonnullRefPtr<Inode>&&);
     NonnullRefPtr<Inode> m_inode;
 };
+
+}

Kernel/FileSystem/InodeIdentifier.h

@@ -26,10 +26,12 @@
 
 #pragma once
 
-#include <AK/String.h>
 #include <AK/ByteBuffer.h>
+#include <AK/String.h>
 #include <AK/Types.h>
 
+namespace Kernel {
+
 class FS;
 struct InodeMetadata;
 
@@ -75,3 +77,4 @@ inline const LogStream& operator<<(const LogStream& stream, const InodeIdentifie
     return stream;
 }
 
+}

Kernel/FileSystem/InodeMetadata.h

@@ -31,6 +31,8 @@
 #include <Kernel/KResult.h>
 #include <Kernel/UnixTypes.h>
 
+namespace Kernel {
+
 class Process;
 
 inline constexpr u32 encoded_device(unsigned major, unsigned minor)
@@ -89,17 +91,17 @@ struct InodeMetadata {
         return mode & 0001;
     }
 
-    bool is_directory() const { return ::is_directory(mode); }
-    bool is_character_device() const { return ::is_character_device(mode); }
-    bool is_block_device() const { return ::is_block_device(mode); }
+    bool is_directory() const { return Kernel::is_directory(mode); }
+    bool is_character_device() const { return Kernel::is_character_device(mode); }
+    bool is_block_device() const { return Kernel::is_block_device(mode); }
     bool is_device() const { return is_character_device() || is_block_device(); }
-    bool is_regular_file() const { return ::is_regular_file(mode); }
-    bool is_fifo() const { return ::is_fifo(mode); }
-    bool is_symlink() const { return ::is_symlink(mode); }
-    bool is_socket() const { return ::is_socket(mode); }
-    bool is_sticky() const { return ::is_sticky(mode); }
-    bool is_setuid() const { return ::is_setuid(mode); }
-    bool is_setgid() const { return ::is_setgid(mode); }
+    bool is_regular_file() const { return Kernel::is_regular_file(mode); }
+    bool is_fifo() const { return Kernel::is_fifo(mode); }
+    bool is_symlink() const { return Kernel::is_symlink(mode); }
+    bool is_socket() const { return Kernel::is_socket(mode); }
+    bool is_sticky() const { return Kernel::is_sticky(mode); }
+    bool is_setuid() const { return Kernel::is_setuid(mode); }
+    bool is_setgid() const { return Kernel::is_setgid(mode); }
 
     KResult stat(stat& buffer) const
     {
@@ -136,3 +138,5 @@ struct InodeMetadata {
     unsigned major_device { 0 };
     unsigned minor_device { 0 };
 };
+
+}

Kernel/FileSystem/InodeWatcher.cpp

@@ -27,6 +27,8 @@
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/FileSystem/InodeWatcher.h>
 
+namespace Kernel {
+
 NonnullRefPtr<InodeWatcher> InodeWatcher::create(Inode& inode)
 {
     return adopt(*new InodeWatcher(inode));
@@ -84,3 +86,5 @@ void InodeWatcher::notify_inode_event(Badge<Inode>, Event::Type event_type)
 {
     m_queue.enqueue({ event_type });
 }
+
+}

Kernel/FileSystem/InodeWatcher.h

@@ -31,6 +31,8 @@
 #include <AK/WeakPtr.h>
 #include <Kernel/FileSystem/File.h>
 
+namespace Kernel {
+
 class Inode;
 
 class InodeWatcher final : public File {
@@ -62,3 +64,5 @@ private:
     WeakPtr<Inode> m_inode;
     CircularQueue<Event, 32> m_queue;
 };
+
+}

Kernel/FileSystem/ProcFS.cpp

@@ -54,6 +54,8 @@
 #include <LibBareMetal/StdLib.h>
 #include <LibC/errno_numbers.h>
 
+namespace Kernel {
+
 enum ProcParentDirectory {
     PDI_AbstractRoot = 0,
     PDI_Root,
@@ -1219,7 +1221,7 @@ bool ProcFSInode::traverse_as_directory(Function<bool(const FS::DirectoryEntry&)
     dbgprintf("ProcFS: traverse_as_directory %u\n", index());
 #endif
 
-    if (!::is_directory(identifier()))
+    if (!Kernel::is_directory(identifier()))
         return false;
 
     auto pid = to_pid(identifier());
@@ -1622,3 +1624,5 @@ KResult ProcFSInode::chown(uid_t, gid_t)
 {
     return KResult(-EPERM);
 }
+
+}

Kernel/FileSystem/ProcFS.h

@@ -32,6 +32,8 @@
 #include <Kernel/KBuffer.h>
 #include <Kernel/Lock.h>
 
+namespace Kernel {
+
 class Process;
 
 class ProcFSInode;
@@ -147,3 +149,5 @@ private:
 
     NonnullRefPtr<FileDescription> m_fd;
 };
+
+}

Kernel/FileSystem/TmpFS.cpp

@@ -28,6 +28,8 @@
 #include <Kernel/Process.h>
 #include <Kernel/Thread.h>
 
+namespace Kernel {
+
 NonnullRefPtr<TmpFS> TmpFS::create()
 {
     return adopt(*new TmpFS);
@@ -397,3 +399,5 @@ void TmpFSInode::one_ref_left()
     // Destroy ourselves.
     fs().unregister_inode(identifier());
 }
+
+}

Kernel/FileSystem/TmpFS.h

@@ -31,6 +31,8 @@
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/KBuffer.h>
 
+namespace Kernel {
+
 class TmpFSInode;
 
 class TmpFS final : public FS {
@@ -106,3 +108,5 @@ private:
     };
     HashMap<String, Child> m_children;
 };
+
+}

Kernel/FileSystem/VirtualFileSystem.cpp

@@ -32,11 +32,14 @@
 #include <Kernel/FileSystem/FileDescription.h>
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/VirtualFileSystem.h>
+#include <Kernel/KSyms.h>
 #include <Kernel/Process.h>
 #include <LibC/errno_numbers.h>
 
 //#define VFS_DEBUG
 
+namespace Kernel {
+
 static VFS* s_the;
 static constexpr int symlink_recursion_limit { 5 }; // FIXME: increase?
 
@@ -848,3 +851,5 @@ KResultOr<NonnullRefPtr<Custody>> VFS::resolve_path(StringView path, Custody& ba
         *out_parent = custody->parent();
     return custody;
 }
+
+}

Kernel/FileSystem/VirtualFileSystem.h

@@ -38,6 +38,7 @@
 #include <Kernel/FileSystem/InodeMetadata.h>
 #include <Kernel/KResult.h>
 
+namespace Kernel {
 
 #define O_RDONLY (1 << 0)
 #define O_WRONLY (1 << 1)
@@ -159,3 +160,5 @@ private:
 
     RefPtr<Custody> m_root_custody;
 };
+
+}

Kernel/Heap/SlabAllocator.cpp

@@ -29,6 +29,8 @@
 #include <Kernel/Heap/kmalloc.h>
 #include <Kernel/VM/Region.h>
 
+namespace Kernel {
+
 template<size_t templated_slab_size>
 class SlabAllocator {
 public:
@@ -160,3 +162,5 @@ void slab_alloc_stats(Function<void(size_t slab_size, size_t allocated, size_t f
         callback(allocator.slab_size(), allocator.num_allocated(), allocator.num_free());
     });
 }
+
+}

Kernel/Heap/SlabAllocator.h

@@ -29,6 +29,8 @@
 #include <AK/Function.h>
 #include <AK/Types.h>
 
+namespace Kernel {
+
 #define SLAB_ALLOC_SCRUB_BYTE 0xab
 #define SLAB_DEALLOC_SCRUB_BYTE 0xbc
 
@@ -43,3 +45,5 @@ public:                                                                  \
     void operator delete(void* ptr) { slab_dealloc(ptr, sizeof(type)); } \
                                                                          \
 private:
+
+}

Kernel/Heap/kmalloc.cpp

@@ -112,21 +112,21 @@ void* kmalloc_page_aligned(size_t size)
 
 void* kmalloc_impl(size_t size)
 {
-    InterruptDisabler disabler;
+    Kernel::InterruptDisabler disabler;
     ++g_kmalloc_call_count;
 
-    if (g_dump_kmalloc_stacks && ksyms_ready) {
+    if (g_dump_kmalloc_stacks && Kernel::ksyms_ready) {
         dbgprintf("kmalloc(%u)\n", size);
-        dump_backtrace();
+        Kernel::dump_backtrace();
     }
 
     // We need space for the allocation_t structure at the head of the block.
     size_t real_size = size + sizeof(allocation_t);
 
     if (sum_free < real_size) {
-        dump_backtrace();
-        kprintf("%s(%u) kmalloc(): PANIC! Out of memory (sucks, dude)\nsum_free=%u, real_size=%u\n", current->process().name().characters(), current->pid(), sum_free, real_size);
-        hang();
+        Kernel::dump_backtrace();
+        kprintf("%s(%u) kmalloc(): PANIC! Out of memory (sucks, dude)\nsum_free=%u, real_size=%u\n", Kernel::current->process().name().characters(), Kernel::current->pid(), sum_free, real_size);
+        Kernel::hang();
     }
 
     size_t chunks_needed = real_size / CHUNK_SIZE;
@@ -177,9 +177,9 @@ void* kmalloc_impl(size_t size)
         }
     }
 
-    kprintf("%s(%u) kmalloc(): PANIC! Out of memory (no suitable block for size %u)\n", current->process().name().characters(), current->pid(), size);
-    dump_backtrace();
-    hang();
+    kprintf("%s(%u) kmalloc(): PANIC! Out of memory (no suitable block for size %u)\n", Kernel::current->process().name().characters(), Kernel::current->pid(), size);
+    Kernel::dump_backtrace();
+    Kernel::hang();
 }
 
 void kfree(void* ptr)
@@ -187,7 +187,7 @@ void kfree(void* ptr)
     if (!ptr)
         return;
 
-    InterruptDisabler disabler;
+    Kernel::InterruptDisabler disabler;
     ++g_kfree_call_count;
 
     auto* a = (allocation_t*)((((u8*)ptr) - sizeof(allocation_t)));
@@ -208,7 +208,7 @@ void* krealloc(void* ptr, size_t new_size)
     if (!ptr)
         return kmalloc(new_size);
 
-    InterruptDisabler disabler;
+    Kernel::InterruptDisabler disabler;
 
     auto* a = (allocation_t*)((((u8*)ptr) - sizeof(allocation_t)));
     size_t old_size = a->nchunk * CHUNK_SIZE;

Kernel/IRQHandler.cpp

@@ -28,6 +28,8 @@
 #include <Kernel/Arch/i386/CPU.h>
 #include <Kernel/Arch/i386/PIC.h>
 
+namespace Kernel {
+
 IRQHandler::IRQHandler(u8 irq)
     : m_irq_number(irq)
 {
@@ -48,3 +50,5 @@ void IRQHandler::disable_irq()
 {
     PIC::disable(m_irq_number);
 }
+
+}

Kernel/IRQHandler.h

@@ -28,6 +28,8 @@
 
 #include <AK/Types.h>
 
+namespace Kernel {
+
 class IRQHandler {
 public:
     virtual ~IRQHandler();
@@ -44,3 +46,5 @@ protected:
 private:
     u8 m_irq_number { 0 };
 };
+
+}

Kernel/KBuffer.h

@@ -41,6 +41,8 @@
 #include <Kernel/VM/MemoryManager.h>
 #include <Kernel/VM/Region.h>
 
+namespace Kernel {
+
 class KBufferImpl : public RefCounted<KBufferImpl> {
 public:
     static NonnullRefPtr<KBufferImpl> create_with_size(size_t size, u8 access, const char* name)
@@ -118,3 +120,5 @@ inline const LogStream& operator<<(const LogStream& stream, const KBuffer& value
 {
     return stream << StringView(value.data(), value.size());
 }
+
+}