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Subject: Re: [PATCH 1/7] tools lib: Add bitmap_alloc function
To: Jiri Olsa <jolsa@kernel.org>, Arnaldo Carvalho de Melo <acme@kernel.org>
References: <1470074555-24889-1-git-send-email-jolsa@kernel.org>
 <1470074555-24889-2-git-send-email-jolsa@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>
From: David Ahern <dsahern@gmail.com>
Message-ID: <9701ea8b-b7d2-3110-f177-1ece7c0cb7b7@gmail.com>
Date: Mon, 1 Aug 2016 12:45:18 -0600
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On 8/1/16 12:02 PM, Jiri Olsa wrote:
> @@ -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 malloc(BITS_TO_LONGS(nbits) * sizeof(unsigned long));
> +}
> +
>  #endif /* _PERF_BITOPS_H */

calloc? Can't imagine any user wanting an uninitialized bitmap.