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/Memory/AddressSpace.h

@@ -67,7 +67,7 @@ public:
 private:
     AddressSpace(NonnullRefPtr<PageDirectory>, VirtualRange total_range);
 
-    mutable RecursiveSpinlock m_lock;
+    mutable RecursiveSpinlock m_lock { LockRank::None };
 
     RefPtr<PageDirectory> m_page_directory;
 

Kernel/Memory/AnonymousVMObject.h

@@ -78,7 +78,7 @@ private:
         void uncommit_one();
 
     private:
-        Spinlock m_lock;
+        Spinlock m_lock { LockRank::None };
         CommittedPhysicalPageSet m_committed_pages;
     };
 

Kernel/Memory/MemoryManager.h

@@ -89,7 +89,7 @@ struct PhysicalMemoryRange {
 struct MemoryManagerData {
     static ProcessorSpecificDataID processor_specific_data_id() { return ProcessorSpecificDataID::MemoryManager; }
 
-    Spinlock m_quickmap_in_use;
+    Spinlock m_quickmap_in_use { LockRank::None };
     u32 m_quickmap_prev_flags;
 
     PhysicalAddress m_last_quickmap_pd;

Kernel/Memory/PageDirectory.h

@@ -72,7 +72,7 @@ private:
 #else
     RefPtr<PhysicalPage> m_directory_pages[4];
 #endif
-    RecursiveSpinlock m_lock;
+    RecursiveSpinlock m_lock { LockRank::None };
 };
 
 void activate_kernel_page_directory(PageDirectory const& pgd);

Kernel/Memory/RegionTree.h

@@ -58,7 +58,8 @@ private:
     ErrorOr<VirtualRange> allocate_range_specific(VirtualAddress base, size_t size);
     ErrorOr<VirtualRange> allocate_range_randomized(size_t size, size_t alignment = PAGE_SIZE);
 
-    RecursiveSpinlock mutable m_lock;
+    // FIXME: We need a Region rank, but we don't know where to put it.
+    RecursiveSpinlock mutable m_lock { LockRank::None };
 
     IntrusiveRedBlackTree<&Region::m_tree_node> m_regions;
     VirtualRange const m_total_range;

Kernel/Memory/RingBuffer.h

@@ -32,7 +32,7 @@ private:
     RingBuffer(NonnullOwnPtr<Memory::Region> region, size_t capacity);
 
     NonnullOwnPtr<Memory::Region> m_region;
-    Spinlock m_lock;
+    Spinlock m_lock { LockRank::None };
     size_t m_start_of_used {};
     size_t m_num_used_bytes {};
     size_t m_capacity_in_bytes {};

Kernel/Memory/SharedFramebufferVMObject.h

@@ -87,7 +87,7 @@ private:
     RefPtr<FakeWritesFramebufferVMObject> m_fake_writes_framebuffer_vmobject;
     RefPtr<RealWritesFramebufferVMObject> m_real_writes_framebuffer_vmobject;
     bool m_writes_are_faked { false };
-    mutable RecursiveSpinlock m_writes_state_lock;
+    mutable RecursiveSpinlock m_writes_state_lock { LockRank::None };
     CommittedPhysicalPageSet m_committed_pages;
 };
 

Kernel/Memory/VMObject.h

@@ -65,7 +65,7 @@ protected:
     IntrusiveListNode<VMObject> m_list_node;
     FixedArray<RefPtr<PhysicalPage>> m_physical_pages;
 
-    mutable RecursiveSpinlock m_lock;
+    mutable RecursiveSpinlock m_lock { LockRank::None };
 
 private:
     VMObject& operator=(VMObject const&) = delete;