git: 111619ff70f0 - stable/13 - LinuxKPI: add bcd.h

The branch stable/13 has been updated by bz:

URL: https://cgit.FreeBSD.org/src/commit/?id=111619ff70f081f244336bfb82cba71b59551d60

commit 111619ff70f081f244336bfb82cba71b59551d60
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2021-10-25 18:14:08 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2021-11-21 18:15:58 +0000

    LinuxKPI: add bcd.h
    
    Add bcd2bin() in bcd.h.
    
    Libkern does provide a bcd2bin() which cannot be used cirectly leaving
    us with a conflict (see comment in file).
    Rather than having code to re-define bcd2bin() for the LinuxKPI
    make sure libkern.h is always included before the LinuxKPI version.
    Then only re-define our local LinuxKPI implementation.  [1]
    From the argument truncating wrapper call the libkern version.
    If we change our libkern implementation in the future we can save
    us the remainder of the hassle. [2].
    
    Suggested by:   Johannes Berg (johannes sipsolutions.net) [1]
    Suggested by:   ian [2]
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit 548ada00e54a9e7745d041b1ec7f68f3bd493365)
    (cherry picked from commit ae2268efd5f8aaa6aba27dfc4e34b3225f211901)
---
 sys/compat/linuxkpi/common/include/linux/bcd.h | 45 ++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/bcd.h b/sys/compat/linuxkpi/common/include/linux/bcd.h
new file mode 100644
index 000000000000..8a40da1a330b
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/bcd.h
@@ -0,0 +1,45 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2021 Bjoern A. Zeeb
+ *
+ * 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	_LINUXKPI_LINUX_BCD_H
+#define	_LINUXKPI_LINUX_BCD_H
+
+#include <sys/types.h>
+#include <sys/libkern.h>
+
+/* Compared to the libkern version this one truncates the argument. */
+static inline uint8_t linuxkpi_bcd2bin(uint8_t x)
+{
+
+	return (bcd2bin(x));
+}
+
+#define	bcd2bin(_x)	linuxkpi_bcd2bin(_x)
+
+#endif	/* _LINUXKPI_LINUX_BCD_H */