Kernel: Require lock rank for Spinlock construction

All users which relied on the default constructor use a None lock rank
for now. This will make it easier to in the future remove LockRank and
actually annotate the ranks by searching for None.

Kernel/FileSystem/SysFS/Component.cpp

@@ -11,7 +11,7 @@
 
 namespace Kernel {
 
-static Spinlock s_index_lock;
+static Spinlock s_index_lock { LockRank::None };
 static InodeIndex s_next_inode_index { 0 };
 
 static size_t allocate_inode_index()

Kernel/FileSystem/SysFS/Component.h

@@ -88,7 +88,7 @@ protected:
 
     SysFSDirectory() {};
     explicit SysFSDirectory(SysFSDirectory const& parent_directory);
-    ChildList m_child_components;
+    ChildList m_child_components { LockRank::None };
 };
 
 }

Kernel/FileSystem/SysFS/Registry.h

@@ -32,7 +32,7 @@ public:
 
 private:
     NonnullRefPtr<SysFSRootDirectory> m_root_directory;
-    Spinlock m_root_directory_lock;
+    Spinlock m_root_directory_lock { LockRank::None };
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Bus/USB/BusDirectory.h

@@ -27,7 +27,7 @@ public:
 
 private:
     explicit SysFSUSBBusDirectory(SysFSBusDirectory&);
-    mutable Spinlock m_lock;
+    mutable Spinlock m_lock { LockRank::None };
 };
 
 }