Index: kernel/generic/include/proc/thread.h
===================================================================
--- kernel/generic/include/proc/thread.h	(revision dd218ea076a20828a183015319cffbd31d1769de)
+++ kernel/generic/include/proc/thread.h	(revision 97d3d9db4f40fc7312c2c51cdda6595ccc6210a4)
@@ -132,11 +132,4 @@
 	bool fpu_context_exists;
 
-	/*
-	 * Defined only if thread doesn't run.
-	 * It means that fpu context is in CPU that last time executes this
-	 * thread. This disables migration.
-	 */
-	bool fpu_context_engaged;
-
 	/* The thread will not be migrated if nomigrate is non-zero. */
 	unsigned int nomigrate;