From 0c35b860913807d4937098d5238c5f4363fb6362 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 28 Aug 2020 17:49:56 +0000
Subject: [PATCH] Allow the pseudo-errnos to be returned as well in boot loader

Expose the pseudo-errno values in _STANDALONE is defined so that code
in the boot loader can make use of them. Nothing uses them today, but
the zstd support that's coming will need them.
---
 sys/sys/errno.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/sys/errno.h b/sys/sys/errno.h
index 6994c0612f79..e53a8d4c6c7f 100644
--- a/sys/sys/errno.h
+++ b/sys/sys/errno.h
@@ -187,7 +187,7 @@ __END_DECLS
 #define	ELAST		97		/* Must be equal largest errno */
 #endif /* _POSIX_SOURCE */
 
-#if defined(_KERNEL) || defined(_WANT_KERNEL_ERRNO)
+#if defined(_KERNEL) || defined(_WANT_KERNEL_ERRNO) || defined(_STANDALONE)
 /* pseudo-errors returned inside kernel to modify return to process */
 #define	ERESTART	(-1)		/* restart syscall */
 #define	EJUSTRETURN	(-2)		/* don't modify regs, just return */