Index: head/sys/arm64/include/vfp.h
===================================================================
--- head/sys/arm64/include/vfp.h	(revision 362090)
+++ head/sys/arm64/include/vfp.h	(revision 362091)
@@ -1,77 +1,78 @@
 /*-
  * Copyright (c) 2015 The FreeBSD Foundation
  * All rights reserved.
  *
  * This software was developed by Andrew Turner under
  * sponsorship from the FreeBSD Foundation.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  * $FreeBSD$
  */
 
 #ifndef _MACHINE_VFP_H_
 #define	_MACHINE_VFP_H_
 
 
 #ifndef LOCORE
 struct vfpstate {
 	__uint128_t	vfp_regs[32];
 	uint32_t	vfp_fpcr;
 	uint32_t	vfp_fpsr;
 };
 
 #ifdef _KERNEL
 struct pcb;
+struct thread;
 
 void	vfp_init(void);
 void	vfp_discard(struct thread *);
 void	vfp_restore_state(void);
 void	vfp_save_state(struct thread *, struct pcb *);
 
 struct fpu_kern_ctx;
 
 /*
  * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
  */
 #define	FPU_KERN_NORMAL	0x0000
 #define	FPU_KERN_NOWAIT	0x0001
 #define	FPU_KERN_KTHR	0x0002
 #define	FPU_KERN_NOCTX	0x0004
 
 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int);
 void fpu_kern_free_ctx(struct fpu_kern_ctx *);
 void fpu_kern_enter(struct thread *, struct fpu_kern_ctx *, u_int);
 int fpu_kern_leave(struct thread *, struct fpu_kern_ctx *);
 int fpu_kern_thread(u_int);
 int is_fpu_kern_thread(u_int);
 
 /* Convert to and from Aarch32 FPSCR to Aarch64 FPCR/FPSR */
 #define VFP_FPSCR_FROM_SRCR(vpsr, vpcr) ((vpsr) | ((vpcr) & 0x7c00000))
 #define VFP_FPSR_FROM_FPSCR(vpscr) ((vpscr) &~ 0x7c00000)
 #define VFP_FPCR_FROM_FPSCR(vpsrc) ((vpsrc) & 0x7c00000)
 
 #endif
 
 #endif
 
 #endif /* !_MACHINE_VFP_H_ */