Kernel: Use `operator ""sv` in all class_name() implementations

Previously there was a mix of returning plain strings and returning
explicit string views using `operator ""sv`. This change switches them
all to standardized on `operator ""sv` as it avoids a call to strlen.

Kernel/Bus/VirtIO/Console.h

@@ -31,7 +31,7 @@ public:
     virtual void initialize() override;
 
 private:
-    virtual StringView class_name() const override { return "VirtIOConsole"; }
+    virtual StringView class_name() const override { return "VirtIOConsole"sv; }
     explicit Console(PCI::DeviceIdentifier const&);
     enum class ControlEvent : u16 {
         DeviceReady = 0,

Kernel/Bus/VirtIO/ConsolePort.h

@@ -35,7 +35,7 @@ public:
 private:
     constexpr static size_t RINGBUFFER_SIZE = 2 * PAGE_SIZE;
 
-    virtual StringView class_name() const override { return "VirtIOConsolePort"; }
+    virtual StringView class_name() const override { return "VirtIOConsolePort"sv; }
 
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;

Kernel/Bus/VirtIO/Device.h

@@ -92,7 +92,7 @@ public:
     virtual void initialize();
 
 protected:
-    virtual StringView class_name() const { return "VirtIO::Device"; }
+    virtual StringView class_name() const { return "VirtIO::Device"sv; }
     explicit Device(PCI::DeviceIdentifier const&);
     struct MappedMMIO {
         OwnPtr<Memory::Region> base;

Kernel/Bus/VirtIO/RNG.h

@@ -26,7 +26,7 @@ public:
     virtual void initialize() override;
 
 private:
-    virtual StringView class_name() const override { return "VirtIOConsole"; }
+    virtual StringView class_name() const override { return "VirtIOConsole"sv; }
     explicit RNG(PCI::DeviceIdentifier const&);
     virtual bool handle_device_config_change() override;
     virtual void handle_queue_update(u16 queue_index) override;

Kernel/Devices/ConsoleDevice.h

@@ -26,7 +26,7 @@ public:
     virtual bool can_write(const Kernel::OpenFileDescription&, size_t) const override { return true; }
     virtual Kernel::KResultOr<size_t> read(OpenFileDescription&, u64, Kernel::UserOrKernelBuffer&, size_t) override;
     virtual Kernel::KResultOr<size_t> write(OpenFileDescription&, u64, const Kernel::UserOrKernelBuffer&, size_t) override;
-    virtual StringView class_name() const override { return "Console"; }
+    virtual StringView class_name() const override { return "Console"sv; }
 
     void put_char(char);
 

Kernel/Devices/FullDevice.h

@@ -26,7 +26,7 @@ private:
     virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
-    virtual StringView class_name() const override { return "FullDevice"; }
+    virtual StringView class_name() const override { return "FullDevice"sv; }
 };
 
 }

Kernel/Devices/HID/KeyboardDevice.h

@@ -49,7 +49,7 @@ protected:
     mutable Spinlock m_queue_lock;
     CircularQueue<Event, 16> m_queue;
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "KeyboardDevice"; }
+    virtual StringView class_name() const override { return "KeyboardDevice"sv; }
 
     u8 m_modifiers { 0 };
     bool m_caps_lock_to_ctrl_pressed { false };

Kernel/Devices/HID/MouseDevice.h

@@ -34,7 +34,7 @@ public:
 protected:
     MouseDevice();
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "MouseDevice"; }
+    virtual StringView class_name() const override { return "MouseDevice"sv; }
 
     mutable Spinlock m_queue_lock;
     CircularQueue<MousePacket, 100> m_queue;

Kernel/Devices/HID/PS2KeyboardDevice.h

@@ -44,7 +44,7 @@ private:
     virtual bool handle_irq(const RegisterState&) override;
 
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "KeyboardDevice"; }
+    virtual StringView class_name() const override { return "KeyboardDevice"sv; }
 };
 
 }

Kernel/Devices/KCOVDevice.h

@@ -29,7 +29,7 @@ public:
 protected:
     KCOVDevice();
 
-    virtual StringView class_name() const override { return "KCOVDevice"; }
+    virtual StringView class_name() const override { return "KCOVDevice"sv; }
 
     virtual bool can_read(const OpenFileDescription&, size_t) const override final { return true; }
     virtual bool can_write(const OpenFileDescription&, size_t) const override final { return true; }

Kernel/Devices/MemoryDevice.h

@@ -26,7 +26,7 @@ public:
 private:
     MemoryDevice();
 
-    virtual StringView class_name() const override { return "MemoryDevice"; }
+    virtual StringView class_name() const override { return "MemoryDevice"sv; }
     virtual bool can_read(const OpenFileDescription&, size_t) const override { return true; }
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return false; }
     virtual bool is_seekable() const override { return true; }

Kernel/Devices/NullDevice.h

@@ -26,7 +26,7 @@ private:
     virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
-    virtual StringView class_name() const override { return "NullDevice"; }
+    virtual StringView class_name() const override { return "NullDevice"sv; }
     virtual bool is_seekable() const override { return true; }
 };
 

Kernel/Devices/RandomDevice.h

@@ -26,7 +26,7 @@ private:
     virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
-    virtual StringView class_name() const override { return "RandomDevice"; }
+    virtual StringView class_name() const override { return "RandomDevice"sv; }
 };
 
 }

Kernel/Devices/SB16.h

@@ -42,7 +42,7 @@ private:
     virtual bool handle_irq(const RegisterState&) override;
 
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "SB16"; }
+    virtual StringView class_name() const override { return "SB16"sv; }
 
     void initialize();
     void wait_for_irq();

Kernel/Devices/SerialDevice.h

@@ -110,7 +110,7 @@ private:
     friend class PCISerialDevice;
 
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "SerialDevice"; }
+    virtual StringView class_name() const override { return "SerialDevice"sv; }
 
     void initialize();
     void set_interrupts(bool interrupt_enable);

Kernel/Devices/ZeroDevice.h

@@ -26,7 +26,7 @@ private:
     virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
-    virtual StringView class_name() const override { return "ZeroDevice"; }
+    virtual StringView class_name() const override { return "ZeroDevice"sv; }
 };
 
 }

Kernel/FileSystem/AnonymousFile.h

@@ -23,7 +23,7 @@ public:
     virtual KResultOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
 
 private:
-    virtual StringView class_name() const override { return "AnonymousFile"; }
+    virtual StringView class_name() const override { return "AnonymousFile"sv; }
     virtual String absolute_path(const OpenFileDescription&) const override { return ":anonymous-file:"; }
     virtual bool can_read(const OpenFileDescription&, size_t) const override { return false; }
     virtual bool can_write(const OpenFileDescription&, size_t) const override { return false; }

Kernel/FileSystem/FIFO.h

@@ -46,7 +46,7 @@ private:
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override;
     virtual String absolute_path(const OpenFileDescription&) const override;
-    virtual StringView class_name() const override { return "FIFO"; }
+    virtual StringView class_name() const override { return "FIFO"sv; }
     virtual bool is_fifo() const override { return true; }
 
     explicit FIFO(UserID, NonnullOwnPtr<DoubleBuffer> buffer);

Kernel/FileSystem/ISO9660FileSystem.h

@@ -309,7 +309,7 @@ public:
 
     virtual ~ISO9660FS() override;
     virtual KResult initialize() override;
-    virtual StringView class_name() const override { return "ISO9660FS"; }
+    virtual StringView class_name() const override { return "ISO9660FS"sv; }
     virtual Inode& root_inode() override;
 
     virtual unsigned total_block_count() const override;

Kernel/FileSystem/InodeFile.h

@@ -43,7 +43,7 @@ public:
     virtual KResult chown(OpenFileDescription&, UserID, GroupID) override;
     virtual KResult chmod(OpenFileDescription&, mode_t) override;
 
-    virtual StringView class_name() const override { return "InodeFile"; }
+    virtual StringView class_name() const override { return "InodeFile"sv; }
 
     virtual bool is_seekable() const override { return true; }
     virtual bool is_inode() const override { return true; }

Kernel/FileSystem/InodeWatcher.h

@@ -51,7 +51,7 @@ public:
     virtual KResult close() override;
 
     virtual String absolute_path(const OpenFileDescription&) const override;
-    virtual StringView class_name() const override { return "InodeWatcher"; };
+    virtual StringView class_name() const override { return "InodeWatcher"sv; };
     virtual bool is_inode_watcher() const override { return true; }
 
     void notify_inode_event(Badge<Inode>, InodeIdentifier, InodeWatcherEvent::Type, String const& name = {});

Kernel/Graphics/FramebufferDevice.h

@@ -38,7 +38,7 @@ private:
     FramebufferDevice(const GraphicsDevice&, size_t, PhysicalAddress, size_t, size_t, size_t);
 
     // ^File
-    virtual StringView class_name() const override { return "FramebufferDevice"; }
+    virtual StringView class_name() const override { return "FramebufferDevice"sv; }
 
     virtual bool can_read(const OpenFileDescription&, size_t) const override final { return true; }
     virtual bool can_write(const OpenFileDescription&, size_t) const override final { return true; }

Kernel/Graphics/VirtIOGPU/FrameBufferDevice.h

@@ -51,7 +51,7 @@ public:
     u8* framebuffer_data();
 
 private:
-    virtual StringView class_name() const override { return "VirtIOFrameBuffer"; }
+    virtual StringView class_name() const override { return "VirtIOFrameBuffer"sv; }
 
     Protocol::DisplayInfoResponse::Display const& display_info() const;
     Protocol::DisplayInfoResponse::Display& display_info();

Kernel/Graphics/VirtIOGPU/GPU.h

@@ -79,7 +79,7 @@ public:
     void flush_dirty_rectangle(ScanoutID, Protocol::Rect const& dirty_rect, ResourceID);
 
 private:
-    virtual StringView class_name() const override { return "VirtIOGPU"; }
+    virtual StringView class_name() const override { return "VirtIOGPU"sv; }
 
     struct Scanout {
         RefPtr<FrameBufferDevice> framebuffer;

Kernel/Net/IPv4Socket.h

@@ -73,7 +73,7 @@ public:
 
 protected:
     IPv4Socket(int type, int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer, OwnPtr<KBuffer> optional_scratch_buffer);
-    virtual StringView class_name() const override { return "IPv4Socket"; }
+    virtual StringView class_name() const override { return "IPv4Socket"sv; }
 
     PortAllocationResult allocate_local_port_if_needed();
 

Kernel/Net/LocalSocket.h

@@ -53,7 +53,7 @@ public:
 
 private:
     explicit LocalSocket(int type, NonnullOwnPtr<DoubleBuffer> client_buffer, NonnullOwnPtr<DoubleBuffer> server_buffer);
-    virtual StringView class_name() const override { return "LocalSocket"; }
+    virtual StringView class_name() const override { return "LocalSocket"sv; }
     virtual bool is_local() const override { return true; }
     bool has_attached_peer(const OpenFileDescription&) const;
     DoubleBuffer* receive_buffer_for(OpenFileDescription&);

Kernel/Net/LoopbackAdapter.h

@@ -21,7 +21,7 @@ public:
     virtual ~LoopbackAdapter() override;
 
     virtual void send_raw(ReadonlyBytes) override;
-    virtual StringView class_name() const override { return "LoopbackAdapter"; }
+    virtual StringView class_name() const override { return "LoopbackAdapter"sv; }
     virtual bool link_up() override { return true; }
     virtual bool link_full_duplex() override { return true; }
     virtual int link_speed() override { return 1000; }

Kernel/Net/Socket.h

@@ -123,7 +123,7 @@ protected:
     size_t backlog() const { return m_backlog; }
     void set_backlog(size_t backlog) { m_backlog = backlog; }
 
-    virtual StringView class_name() const override { return "Socket"; }
+    virtual StringView class_name() const override { return "Socket"sv; }
 
     virtual void shut_down_for_reading() { }
     virtual void shut_down_for_writing() { }

Kernel/Net/TCPSocket.h

@@ -166,7 +166,7 @@ protected:
 
 private:
     explicit TCPSocket(int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer, NonnullOwnPtr<KBuffer> scratch_buffer);
-    virtual StringView class_name() const override { return "TCPSocket"; }
+    virtual StringView class_name() const override { return "TCPSocket"sv; }
 
     virtual void shut_down_for_writing() override;
 

Kernel/Net/UDPSocket.h

@@ -22,7 +22,7 @@ public:
 
 private:
     explicit UDPSocket(int protocol, NonnullOwnPtr<DoubleBuffer> receive_buffer);
-    virtual StringView class_name() const override { return "UDPSocket"; }
+    virtual StringView class_name() const override { return "UDPSocket"sv; }
     static MutexProtected<HashMap<u16, UDPSocket*>>& sockets_by_port();
 
     virtual KResultOr<size_t> protocol_receive(ReadonlyBytes raw_ipv4_packet, UserOrKernelBuffer& buffer, size_t buffer_size, int flags) override;

Kernel/Storage/PATADiskDevice.cpp

@@ -37,7 +37,7 @@ UNMAP_AFTER_INIT PATADiskDevice::~PATADiskDevice()
 
 StringView PATADiskDevice::class_name() const
 {
-    return "PATADiskDevice";
+    return "PATADiskDevice"sv;
 }
 
 void PATADiskDevice::start_request(AsyncBlockDeviceRequest& request)

Kernel/Storage/Partition/DiskPartition.cpp

@@ -77,7 +77,7 @@ bool DiskPartition::can_write(const OpenFileDescription& fd, size_t offset) cons
 
 StringView DiskPartition::class_name() const
 {
-    return "DiskPartition";
+    return "DiskPartition"sv;
 }
 
 }

Kernel/Storage/RamdiskDevice.cpp

@@ -34,7 +34,7 @@ RamdiskDevice::~RamdiskDevice()
 
 StringView RamdiskDevice::class_name() const
 {
-    return "RamdiskDevice";
+    return "RamdiskDevice"sv;
 }
 
 void RamdiskDevice::start_request(AsyncBlockDeviceRequest& request)

Kernel/Storage/SATADiskDevice.cpp

@@ -33,7 +33,7 @@ SATADiskDevice::~SATADiskDevice()
 
 StringView SATADiskDevice::class_name() const
 {
-    return "SATADiskDevice";
+    return "SATADiskDevice"sv;
 }
 
 void SATADiskDevice::start_request(AsyncBlockDeviceRequest& request)

Kernel/Storage/StorageDevice.cpp

@@ -29,7 +29,7 @@ StorageDevice::StorageDevice(const StorageController& controller, int major, int
 
 StringView StorageDevice::class_name() const
 {
-    return "StorageDevice";
+    return "StorageDevice"sv;
 }
 
 NonnullRefPtr<StorageController> StorageDevice::controller() const

Kernel/TTY/MasterPTY.h

@@ -38,7 +38,7 @@ private:
     virtual KResult close() override;
     virtual bool is_master_pty() const override { return true; }
     virtual KResult ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override;
-    virtual StringView class_name() const override { return "MasterPTY"; }
+    virtual StringView class_name() const override { return "MasterPTY"sv; }
 
     RefPtr<SlavePTY> m_slave;
     unsigned m_index;

Kernel/TTY/PTYMultiplexer.h

@@ -34,7 +34,7 @@ public:
 
 private:
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "PTYMultiplexer"; }
+    virtual StringView class_name() const override { return "PTYMultiplexer"sv; }
 
     static constexpr size_t max_pty_pairs = 64;
     MutexProtected<Vector<unsigned, max_pty_pairs>> m_freelist;

Kernel/TTY/SlavePTY.h

@@ -35,7 +35,7 @@ private:
     virtual bool can_read(const OpenFileDescription&, size_t) const override;
     virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
     virtual bool can_write(const OpenFileDescription&, size_t) const override;
-    virtual StringView class_name() const override { return "SlavePTY"; }
+    virtual StringView class_name() const override { return "SlavePTY"sv; }
     virtual KResult close() override;
 
     friend class MasterPTY;

Kernel/TTY/VirtualConsole.h

@@ -106,7 +106,7 @@ private:
     virtual void set_cursor_style(VT::CursorStyle) override;
 
     // ^CharacterDevice
-    virtual StringView class_name() const override { return "VirtualConsole"; }
+    virtual StringView class_name() const override { return "VirtualConsole"sv; }
 
     void set_active(bool);
     void flush_dirty_lines();