Fix <sys/_bitset.h> and <sys/_cpuset.h> to not require <sys/param.h>.

- Hardcode '8' instead of NBBY in _BITSET_BITS.
- Define a private version of 'howmany' for use in __bitset_words().
- While here, move a few more things out of _bitset.h and _cpuset.h to
  bitset.h and cpuset.h, respectively.  The only things left in
  _bitset.h and _cpuset.h are the bits needed to define a bitset
  structure.

Reviewed by:	bde, kib (ish)

sys/arm/arm/genassym.c

@@ -28,6 +28,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 #include <sys/param.h>
+#include <sys/cpuset.h>
 #include <sys/systm.h>
 #include <sys/assym.h>
 #include <sys/proc.h>

sys/sys/_bitset.h

@@ -36,26 +36,15 @@
  * Macros addressing word and bit within it, tuned to make compiler
  * optimize cases when SETSIZE fits into single machine word.
  */
-#define	_BITSET_BITS		(sizeof(long) * NBBY)
+#define	_BITSET_BITS		(sizeof(long) * 8)
 
-#define	__bitset_words(_s)	(howmany(_s, _BITSET_BITS))
+#define	__howmany(x, y)	(((x) + ((y) - 1)) / (y))
 
-#define	__bitset_mask(_s, n)						\
-	(1L << ((__bitset_words((_s)) == 1) ?				\
-	    (__size_t)(n) : ((n) % _BITSET_BITS)))
-
-#define	__bitset_word(_s, n)						\
-	((__bitset_words((_s)) == 1) ? 0 : ((n) / _BITSET_BITS))
+#define	__bitset_words(_s)	(__howmany(_s, _BITSET_BITS))
 
 #define	BITSET_DEFINE(t, _s)						\
 struct t {								\
         long    __bits[__bitset_words((_s))];				\
 }
 
-#define	BITSET_T_INITIALIZER(x)						\
-	{ .__bits = { x } }
-
-#define	BITSET_FSET(n)							\
-	[ 0 ... ((n) - 1) ] = (-1L)
-
 #endif /* !_SYS__BITSET_H_ */

sys/sys/_cpuset.h

@@ -44,13 +44,7 @@
 #define	CPU_SETSIZE	CPU_MAXSIZE
 #endif
 
-#define	_NCPUBITS	_BITSET_BITS
-#define	_NCPUWORDS	__bitset_words(CPU_SETSIZE)
-
 BITSET_DEFINE(_cpuset, CPU_SETSIZE);
 typedef struct _cpuset cpuset_t;
 
-#define	CPUSET_FSET		BITSET_FSET(_NCPUWORDS)
-#define	CPUSET_T_INITIALIZER	BITSET_T_INITIALIZER
-
 #endif /* !_SYS__CPUSET_H_ */

sys/sys/bitset.h

@@ -32,6 +32,13 @@
 #ifndef _SYS_BITSET_H_
 #define	_SYS_BITSET_H_
 
+#define	__bitset_mask(_s, n)						\
+	(1L << ((__bitset_words((_s)) == 1) ?				\
+	    (__size_t)(n) : ((n) % _BITSET_BITS)))
+
+#define	__bitset_word(_s, n)						\
+	((__bitset_words((_s)) == 1) ? 0 : ((n) / _BITSET_BITS))
+
 #define	BIT_CLR(_s, n, p)						\
 	((p)->__bits[__bitset_word(_s, n)] &= ~__bitset_mask((_s), (n)))
 
@@ -185,5 +192,11 @@
 		__count += __bitcountl((p)->__bits[__i]);		\
 	__count;							\
 })
-	
+
+#define	BITSET_T_INITIALIZER(x)						\
+	{ .__bits = { x } }
+
+#define	BITSET_FSET(n)							\
+	[ 0 ... ((n) - 1) ] = (-1L)
+
 #endif /* !_SYS_BITSET_H_ */

sys/sys/cpuset.h

@@ -35,6 +35,10 @@
 #include <sys/_cpuset.h>
 
 #include <sys/bitset.h>
+#include <sys/queue.h>
+
+#define	_NCPUBITS	_BITSET_BITS
+#define	_NCPUWORDS	__bitset_words(CPU_SETSIZE)
 
 #define	CPUSETBUFSIZ	((2 + sizeof(long) * 2) * _NCPUWORDS)
 
@@ -61,6 +65,8 @@
 #define	CPU_COPY_STORE_REL(f, t)	BIT_COPY_STORE_REL(CPU_SETSIZE, f, t)
 #define	CPU_FFS(p)			BIT_FFS(CPU_SETSIZE, p)
 #define	CPU_COUNT(p)			BIT_COUNT(CPU_SETSIZE, p)
+#define	CPUSET_FSET			BITSET_FSET(_NCPUWORDS)
+#define	CPUSET_T_INITIALIZER		BITSET_T_INITIALIZER
 
 /*
  * Valid cpulevel_t values.