git: 68d289075c76 - stable/14 - sys/param.h: Split some macros into new <sys/_param.h>

The branch stable/14 has been updated by olce:

URL: https://cgit.FreeBSD.org/src/commit/?id=68d289075c766bd742913023a56569863121021b

commit 68d289075c766bd742913023a56569863121021b
Author:     Olivier Certner <olce@FreeBSD.org>
AuthorDate: 2025-06-06 20:25:21 +0000
Commit:     Olivier Certner <olce@FreeBSD.org>
CommitDate: 2025-07-28 13:27:52 +0000

    sys/param.h: Split some macros into new <sys/_param.h>
    
    Goal is to avoid having to include the full <sys/param.h> just to get
    some common useful macros.  More macros can be moved into it as needed.
    
    This is in preparation for using NBBY and howmany() from <sys/runq.h>.
    
    Reviewed by:    kib, imp (both older version)
    MFC after:      1 month
    Event:          Kitchener-Waterloo Hackathon 202506
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D50880
    
    (cherry picked from commit b93161a7e38d37ce560ca562b1f1c18f73551cc2)
---
 sys/sys/_param.h | 28 ++++++++++++++++++++++++++++
 sys/sys/param.h  | 15 ++-------------
 2 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/sys/sys/_param.h b/sys/sys/_param.h
new file mode 100644
index 000000000000..a7ea071c456a
--- /dev/null
+++ b/sys/sys/_param.h
@@ -0,0 +1,28 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1982, 1986, 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ */
+
+#ifndef _SYS__PARAM_H_
+#define _SYS__PARAM_H_
+
+#define NBBY	8		/* number of bits in a byte */
+#define NBPW	sizeof(int)	/* number of bytes per word (integer) */
+
+/*
+ * Macros for counting and rounding.
+ */
+#define	nitems(x)	(sizeof((x)) / sizeof((x)[0]))
+#ifndef howmany
+#define howmany(x, y)	(((x)+((y)-1))/(y))
+#endif
+#define	rounddown(x, y)	(((x)/(y))*(y))
+#define	rounddown2(x, y) __align_down(x, y) /* if y is power of two */
+#define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))  /* to any y */
+#define	roundup2(x, y)	__align_up(x, y) /* if y is powers of two */
+#define powerof2(x)	((((x)-1)&(x))==0)
+
+#endif /* _SYS__PARAM_H_ */
diff --git a/sys/sys/param.h b/sys/sys/param.h
index 68cbc92b5791..74490f5e6e0e 100644
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -40,6 +40,7 @@
 #define _SYS_PARAM_H_
 
 #include <sys/_null.h>
+#include <sys/_param.h>
 
 #define	BSD	199506		/* System version (year & month). */
 #define BSD4_3	1
@@ -251,9 +252,6 @@
 
 #define	NZERO	0		/* default "nice" */
 
-#define	NBBY	8		/* number of bits in a byte */
-#define	NBPW	sizeof(int)	/* number of bytes per word (integer) */
-
 #define	CMASK	022		/* default file mask: S_IWGRP|S_IWOTH */
 
 #define	NODEV	(dev_t)(-1)	/* non-existent device */
@@ -317,16 +315,7 @@
 #define	isclr(a,i)							\
 	((((const unsigned char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 
-/* Macros for counting and rounding. */
-#ifndef howmany
-#define	howmany(x, y)	(((x)+((y)-1))/(y))
-#endif
-#define	nitems(x)	(sizeof((x)) / sizeof((x)[0]))
-#define	rounddown(x, y)	(((x)/(y))*(y))
-#define	rounddown2(x, y) __align_down(x, y) /* if y is power of two */
-#define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))  /* to any y */
-#define	roundup2(x, y)	__align_up(x, y) /* if y is powers of two */
-#define powerof2(x)	((((x)-1)&(x))==0)
+/* Macros for counting and rounding provided by <sys/_param.h>. */
 
 /* Macros for min/max. */
 #define	MIN(a,b) (((a)<(b))?(a):(b))