[src/trunk]: src/sys/external/bsd/drm2/include/linux Populate circ_buf.h with...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e6893a0ae018
branches:  trunk
changeset: 834992:e6893a0ae018
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Aug 27 07:15:18 2018 +0000

description:
Populate circ_buf.h with CIRC_SPACE.

diffstat:

 sys/external/bsd/drm2/include/linux/circ_buf.h |  38 ++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)

diffs (42 lines):

diff -r f8f2e317d6f0 -r e6893a0ae018 sys/external/bsd/drm2/include/linux/circ_buf.h
--- a/sys/external/bsd/drm2/include/linux/circ_buf.h    Mon Aug 27 07:15:06 2018 +0000
+++ b/sys/external/bsd/drm2/include/linux/circ_buf.h    Mon Aug 27 07:15:18 2018 +0000
@@ -0,0 +1,38 @@
+/*     $NetBSD: circ_buf.h,v 1.2 2018/08/27 07:15:18 riastradh Exp $   */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef        _LINUX_CIRC_BUF_H_
+#define        _LINUX_CIRC_BUF_H_
+
+#define        CIRC_SPACE(HEAD, TAIL, SIZE)                                          \
+       (((TAIL) - ((HEAD) + 1)) & ((SIZE) - 1))
+
+#endif /* _LINUX_CIRC_BUF_H_ */