From d303752b5067164c3abf580a6c4ea8d0dfdf7a67 Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Thu, 14 Apr 2016 04:16:31 +0000
Subject: [PATCH] Add comment about where b_iocmd and b_ioflags come from.

---
 sys/sys/buf.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/sys/buf.h b/sys/sys/buf.h
index c85b88ff54f4..012493ca84dc 100644
--- a/sys/sys/buf.h
+++ b/sys/sys/buf.h
@@ -98,8 +98,8 @@ struct buf {
 	void		*b_caller1;
 	caddr_t		b_data;
 	int		b_error;
-	uint8_t		b_iocmd;
-	uint8_t		b_ioflags;
+	uint8_t		b_iocmd;	/* BIO_* bio_cmd from bio.h */
+	uint8_t		b_ioflags;	/* BIO_* bio_flags from bio.h */
 	off_t		b_iooffset;
 	long		b_resid;
 	void	(*b_iodone)(struct buf *);