Kernel: Fix most of mutex + block race conditions

All block functions now take an optional mutex parameter that is
atomically unlocked instead of having the user unlock it before hand.
This prevents a ton of race conditions everywhere in the code!

kernel/include/kernel/Lock/LockGuard.h

@@ -29,30 +29,4 @@ namespace Kernel
 		Lock& m_lock;
 	};
 
-	template<typename Lock>
-	class LockFreeGuard
-	{
-		BAN_NON_COPYABLE(LockFreeGuard);
-		BAN_NON_MOVABLE(LockFreeGuard);
-
-	public:
-		LockFreeGuard(Lock& lock)
-			: m_lock(lock)
-			, m_depth(lock.lock_depth())
-		{
-			for (uint32_t i = 0; i < m_depth; i++)
-				m_lock.unlock();
-		}
-
-		~LockFreeGuard()
-		{
-			for (uint32_t i = 0; i < m_depth; i++)
-				m_lock.lock();
-		}
-
-	private:
-		Lock& m_lock;
-		const uint32_t m_depth;
-	};
-
 }