linux-kernel - [RFC PATCH v1 2/3] do not merge: Temporary fix for is_power_of

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Message-Id: <20220810171702.74932-3-flaniel@linux.microsoft.com>
Date:   Wed, 10 Aug 2022 19:16:53 +0200
From:   Francis Laniel <flaniel@...ux.microsoft.com>
To:     bpf@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Francis Laniel <flaniel@...ux.microsoft.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Joanne Koong <joannelkoong@...il.com>,
        Dave Marchevsky <davemarchevsky@...com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Geliang Tang <geliang.tang@...e.com>,
        Hengqi Chen <hengqi.chen@...il.com>
Subject: [RFC PATCH v1 2/3] do not merge: Temporary fix for is_power_of_2.

Signed-off-by: Francis Laniel <flaniel@...ux.microsoft.com>
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e89cc9c885b3..5d0e997c85ea 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -4945,7 +4945,7 @@ 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)) == 0;
 }
 
 static size_t adjust_ringbuf_sz(size_t sz)
-- 
2.25.1