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libbpf: Add likely/unlikely macros and use them in selftests

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A few selftests and, more importantly, consequent changes to the
bpf_helpers.h file, use likely/unlikely macros, so define them here
and remove duplicate definitions from existing selftests.

Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250331203618.1973691-3-a.s.protopopov@gmail.com
This commit is contained in:
Anton Protopopov
2025-03-31 20:36:18 +00:00
committed by Andrii Nakryiko
parent 4687560af9
commit 7a1388d55f
1 changed files with 8 additions and 0 deletions
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8
src/bpf_helpers.h
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@@ -15,6 +15,14 @@
#define __array(name, val) typeof(val) *name[] #define __array(name, val) typeof(val) *name[]
#define __ulong(name, val) enum { ___bpf_concat(__unique_value, __COUNTER__) = 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 * Helper macro to place programs, maps, license in
* different sections in elf_bpf file. Section names * different sections in elf_bpf file. Section names