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Tue, 18 Mar 2025 07:29:55 -0700 (PDT) Received: from localhost.localdomain ([2a04:ee41:4:b2de:1ac0:4dff:fe0f:3782]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-395cb40cdd0sm18348071f8f.77.2025.03.18.07.29.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Mar 2025 07:29:55 -0700 (PDT) From: Anton Protopopov To: bpf@vger.kernel.org, Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman , Yonghong Song , Quentin Monnet , Anton Protopopov , Alexei Starovoitov Subject: [RFC PATCH bpf-next 10/14] libbpf: add likely/unlikely macros Date: Tue, 18 Mar 2025 14:33:14 +0000 Message-Id: <20250318143318.656785-11-aspsk@isovalent.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250318143318.656785-1-aspsk@isovalent.com> References: <20250318143318.656785-1-aspsk@isovalent.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC A few selftests and, more importantly, a consequent changes to the bpf_helpers.h file use likely/unlikely macros. So define them here. Signed-off-by: Anton Protopopov --- tools/lib/bpf/bpf_helpers.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index 686824b8b413..a50773d4616e 100644 --- a/tools/lib/bpf/bpf_helpers.h +++ b/tools/lib/bpf/bpf_helpers.h @@ -15,6 +15,14 @@ #define __array(name, val) typeof(val) *name[] #define __ulong(name, val) enum { ___bpf_concat(__unique_value, __COUNTER__) = val } name +#ifndef likely +#define likely(x) (__builtin_expect(!!(x), 1)) +#endif + +#ifndef unlikely +#define unlikely(x) (__builtin_expect(!!(x), 0)) +#endif + /* * Helper macro to place programs, maps, license in * different sections in elf_bpf file. Section names