Re: [PATCH] libbpf: Fix is_pow_of_2

From: Pavel Machek
Date: Sun Jun 19 2022 - 13:13:06 EST


Hi!

> From: Yuze Chi <chiyuze@xxxxxxxxxx>
>
> +++ b/tools/lib/bpf/libbpf.c
> @@ -4956,7 +4956,7 @@ static void bpf_map__destroy(struct bpf_map *map);
>
> static bool is_pow_of_2(size_t x)
> {
> - return x && (x & (x - 1));
> + return x && !(x & (x - 1));
> }

I'm pretty sure we have this test in macro in includes somewhere... should we use
that instead?
Pavel
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