[PATCH 3/3] selftests/bpf: Fix endianness issue in __qspinlock declaration

[Ilya Leoshkevich <iii@linux.ibm.com>]

Copy the big-endian field declarations from qspinlock_types.h,
otherwise some properties won't hold on big-endian systems. For
example, assigning lock->val = 1 should result in lock->locked == 1,
which is not the case there.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 .../selftests/bpf/progs/bpf_arena_spin_lock.h        | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/bpf/progs/bpf_arena_spin_lock.h b/tools/testing/selftests/bpf/progs/bpf_arena_spin_lock.h
index 4e29c31c4ef8..d67466c1ff77 100644
--- a/tools/testing/selftests/bpf/progs/bpf_arena_spin_lock.h
+++ b/tools/testing/selftests/bpf/progs/bpf_arena_spin_lock.h
@@ -32,6 +32,7 @@ extern unsigned long CONFIG_NR_CPUS __kconfig;
 struct __qspinlock {
 	union {
 		atomic_t val;
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 		struct {
 			u8 locked;
 			u8 pending;
@@ -40,6 +41,17 @@ struct __qspinlock {
 			u16 locked_pending;
 			u16 tail;
 		};
+#else
+		struct {
+			u16 tail;
+			u16 locked_pending;
+		};
+		struct {
+			u8 reserved[2];
+			u8 pending;
+			u8 locked;
+		};
+#endif
 	};
 };
 
-- 
2.49.0