Kernel: Start making device numbers unique for each device

kernel/kernel/FS/TmpFS/FileSystem.cpp

@@ -1,9 +1,18 @@
+#include <kernel/Device/DeviceNumbers.h>
 #include <kernel/FS/TmpFS/FileSystem.h>
 #include <kernel/Memory/Heap.h>
 
+#include <sys/sysmacros.h>
+
 namespace Kernel
 {
 
+	static dev_t get_next_rdev()
+	{
+		static dev_t minor = 0;
+		return makedev(DeviceNumber::TmpFS, minor++);
+	}
+
 	BAN::ErrorOr<TmpFileSystem*> TmpFileSystem::create(size_t max_pages, mode_t mode, uid_t uid, gid_t gid)
 	{
 		if (max_pages < 2)
@@ -17,7 +26,8 @@ namespace Kernel
 	}
 
 	TmpFileSystem::TmpFileSystem(size_t max_pages)
-		: m_max_pages(max_pages)
+		: m_rdev(get_next_rdev())
+		, m_max_pages(max_pages)
 	{ }
 
 	BAN::ErrorOr<void> TmpFileSystem::initialize(mode_t mode, uid_t uid, gid_t gid)

kernel/kernel/FS/TmpFS/Inode.cpp

@@ -41,6 +41,11 @@ namespace Kernel
 
 	/* GENERAL INODE */
 
+	dev_t TmpInode::dev() const
+	{
+		return m_fs.dev();
+	}
+
 	BAN::ErrorOr<BAN::RefPtr<TmpInode>> TmpInode::create_from_existing(TmpFileSystem& fs, ino_t ino, const TmpInodeInfo& info)
 	{
 		TmpInode* inode_ptr = nullptr;