mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-04-15 12:07:33 +07:00
850f8127fa
Adding implementation os bitmap_or function to the bitmap object. It is stolen from the kernel lib/bitmap.o object. It is used in upcomming patches. Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1327674868-10486-5-git-send-email-jolsa@redhat.com Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#ifndef _PERF_BITOPS_H
|
|
#define _PERF_BITOPS_H
|
|
|
|
#include <string.h>
|
|
#include <linux/bitops.h>
|
|
|
|
int __bitmap_weight(const unsigned long *bitmap, int bits);
|
|
void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
|
|
const unsigned long *bitmap2, int bits);
|
|
|
|
#define BITMAP_LAST_WORD_MASK(nbits) \
|
|
( \
|
|
((nbits) % BITS_PER_LONG) ? \
|
|
(1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
|
|
)
|
|
|
|
#define small_const_nbits(nbits) \
|
|
(__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
|
|
|
|
static inline void bitmap_zero(unsigned long *dst, int nbits)
|
|
{
|
|
if (small_const_nbits(nbits))
|
|
*dst = 0UL;
|
|
else {
|
|
int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
|
|
memset(dst, 0, len);
|
|
}
|
|
}
|
|
|
|
static inline int bitmap_weight(const unsigned long *src, int nbits)
|
|
{
|
|
if (small_const_nbits(nbits))
|
|
return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
|
|
return __bitmap_weight(src, nbits);
|
|
}
|
|
|
|
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
|
|
const unsigned long *src2, int nbits)
|
|
{
|
|
if (small_const_nbits(nbits))
|
|
*dst = *src1 | *src2;
|
|
else
|
|
__bitmap_or(dst, src1, src2, nbits);
|
|
}
|
|
|
|
#endif /* _PERF_BITOPS_H */
|