mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-05-03 22:05:56 +00:00
fb72014d98
We need to refactor code to be explicitely shared by the kernel and at least the tools/ userspace programs, so, till we do that, copy the bare minimum bitmap/bitops code needed by tools/perf. Reported-by: "H. Peter Anvin" <hpa@zytor.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
27 lines
684 B
C
27 lines
684 B
C
#ifndef _PERF_LINUX_BITOPS_H_
|
|
#define _PERF_LINUX_BITOPS_H_
|
|
|
|
#include <linux/kernel.h>
|
|
#include <asm/hweight.h>
|
|
|
|
#define BITS_PER_LONG __WORDSIZE
|
|
#define BITS_PER_BYTE 8
|
|
#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
|
|
|
|
static inline void set_bit(int nr, unsigned long *addr)
|
|
{
|
|
addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG);
|
|
}
|
|
|
|
static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
|
|
{
|
|
return ((1UL << (nr % BITS_PER_LONG)) &
|
|
(((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0;
|
|
}
|
|
|
|
static inline unsigned long hweight_long(unsigned long w)
|
|
{
|
|
return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
|
|
}
|
|
|
|
#endif
|