diff --git a/kernel/include/kernel/FS/Inode.h b/kernel/include/kernel/FS/Inode.h
index 4cdc16e3..2d4520a6 100644
--- a/kernel/include/kernel/FS/Inode.h
+++ b/kernel/include/kernel/FS/Inode.h
@@ -121,9 +121,10 @@ namespace Kernel
 		virtual BAN::ErrorOr<void> chmod_impl(mode_t)						{ return BAN::Error::from_errno(ENOTSUP); }
 		virtual bool has_data_impl() const { dwarnln("nonblock not supported"); return true; }
 
-	private:
-		mutable RecursiveSpinLock m_lock;
+	protected:
+		mutable RecursivePrioritySpinLock m_lock;
 
+	private:
 		BAN::WeakPtr<SharedFileData> m_shared_region;
 		friend class FileBackedRegion;
 	};
diff --git a/kernel/include/kernel/Terminal/TTY.h b/kernel/include/kernel/Terminal/TTY.h
index 9c776167..2f3c5a37 100644
--- a/kernel/include/kernel/Terminal/TTY.h
+++ b/kernel/include/kernel/Terminal/TTY.h
@@ -56,8 +56,6 @@ namespace Kernel
 		void do_backspace();
 
 	protected:
-		mutable Kernel::RecursiveSpinLock m_lock;
-
 		TerminalDriver::Color m_foreground { TerminalColor::BRIGHT_WHITE };
 		TerminalDriver::Color m_background { TerminalColor::BLACK };
 		termios m_termios;
diff --git a/kernel/kernel/Terminal/TTY.cpp b/kernel/kernel/Terminal/TTY.cpp
index bcfd14c7..bf8ffc4e 100644
--- a/kernel/kernel/Terminal/TTY.cpp
+++ b/kernel/kernel/Terminal/TTY.cpp
@@ -303,9 +303,13 @@ namespace Kernel
 		LockGuard _(m_lock);
 		while (!m_output.flush)
 		{
-			m_lock.unlock();
+			// FIXME: this is very hacky way to unlock lock temporarily
+			uint32_t depth = m_lock.lock_depth();
+			for (uint32_t i = 0; i < depth; i++)
+				m_lock.unlock();
 			bool eintr = Thread::current().block_or_eintr(m_output.semaphore);
-			m_lock.lock();
+			for (uint32_t i = 0; i < depth; i++)
+				m_lock.lock();
 			if (eintr)
 				return BAN::Error::from_errno(EINTR);
 		}