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[RFC,bpf-next,09/14] selftests/bpf: add guard macros around likely/unlikely

Message ID 20250318143318.656785-10-aspsk@isovalent.com (mailing list archive)
State RFC
Delegated to: BPF
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Commit Message

Anton Protopopov March 18, 2025, 2:33 p.m. UTC 
Add guard macros around likely/unlikely definitions such that, if defined
previously, the compilation doesn't break. (Those macros, actually,
will be defined in libbpf in a consequent commit.)

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
---
 tools/testing/selftests/bpf/bpf_arena_spin_lock.h | 5 +++++
 tools/testing/selftests/bpf/progs/iters.c         | 2 ++
 2 files changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/tools/testing/selftests/bpf/bpf_arena_spin_lock.h b/tools/testing/selftests/bpf/bpf_arena_spin_lock.h
index fb8dc0768999..d60d899dd9da 100644
--- a/tools/testing/selftests/bpf/bpf_arena_spin_lock.h
+++ b/tools/testing/selftests/bpf/bpf_arena_spin_lock.h
@@ -95,8 +95,13 @@  struct arena_qnode {
 #define _Q_LOCKED_VAL		(1U << _Q_LOCKED_OFFSET)
 #define _Q_PENDING_VAL		(1U << _Q_PENDING_OFFSET)
 
+#ifndef likely
 #define likely(x) __builtin_expect(!!(x), 1)
+#endif
+
+#ifndef unlikely
 #define unlikely(x) __builtin_expect(!!(x), 0)
+#endif
 
 struct arena_qnode __arena qnodes[_Q_MAX_CPUS][_Q_MAX_NODES];
 
diff --git a/tools/testing/selftests/bpf/progs/iters.c b/tools/testing/selftests/bpf/progs/iters.c
index 427b72954b87..1b9a908f2607 100644
--- a/tools/testing/selftests/bpf/progs/iters.c
+++ b/tools/testing/selftests/bpf/progs/iters.c
@@ -7,7 +7,9 @@ 
 #include "bpf_misc.h"
 #include "bpf_compiler.h"
 
+#ifndef unlikely
 #define unlikely(x)	__builtin_expect(!!(x), 0)
+#endif
 
 static volatile int zero = 0;