Kernel: Use StringView instead of C strings in Mutex

Kernel/Locking/Mutex.h

@@ -26,7 +26,7 @@ class Mutex {
 public:
  using Mode = LockMode;
 
- Mutex(const char* name = nullptr)
+ Mutex(StringView name = {})
  : m_name(name)
  {
  }
@@ -52,19 +52,19 @@ class Mutex {
  return false;
  }
 
- [[nodiscard]] const char* name() const { return m_name; }
+ [[nodiscard]] StringView name() const { return m_name; }
 
- static const char* mode_to_string(Mode mode)
+ static StringView mode_to_string(Mode mode)
  {
  switch (mode) {
  case Mode::Unlocked:
- return "unlocked";
+ return "unlocked"sv;
  case Mode::Exclusive:
- return "exclusive";
+ return "exclusive"sv;
  case Mode::Shared:
- return "shared";
+ return "shared"sv;
  default:
- return "invalid";
+ return "invalid"sv;
  }
  }
 
@@ -80,7 +80,7 @@ class Mutex {
  void block(Thread&, Mode, SpinlockLocker<Spinlock<u8>>&, u32);
  void unblock_waiters(Mode);
 
- const char* m_name { nullptr };
+ StringView m_name;
  Mode m_mode { Mode::Unlocked };
 
  // When locked exclusively, only the thread already holding the lock can