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tools lib: Add bitmap_alloc function 

Adding bitmap_alloc function to dynamically allocate bitmap.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20160802113302.GA7479@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2016-08-02 13:33:02 +02:00 committed by Arnaldo Carvalho de Melo
parent 979a70a237
commit 98c032967a
1 changed files with 10 additions and 0 deletions
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10
tools/include/linux/bitmap.h
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@ -3,6 +3,7 @@
#include <string.h>
#include <linux/bitops.h>
#include <stdlib.h>
#define DECLARE_BITMAP(name,bits) \
unsigned long name[BITS_TO_LONGS(bits)]
@ -65,4 +66,13 @@ static inline int test_and_set_bit(int nr, unsigned long *addr)
return (old & mask) != 0;
}
/**
* bitmap_alloc - Allocate bitmap
* @nr: Bit to set
*/
static inline unsigned long *bitmap_alloc(int nbits)
{
return calloc(1, BITS_TO_LONGS(nbits) * sizeof(unsigned long));
}
#endif /* _PERF_BITOPS_H */