linux-kernel - [PATCH bpf-next] selftests/bpf: Fix htab_update/reenter

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Message-ID: <20251106052628.349117-1-skb99@linux.ibm.com>
Date: Thu,  6 Nov 2025 10:56:28 +0530
From: Saket Kumar Bhaskar <skb99@...ux.ibm.com>
To: bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: hbathini@...ux.ibm.com, sachinpb@...ux.ibm.com, venkat88@...ux.ibm.com,
        andrii@...nel.org, eddyz87@...il.com, ast@...nel.org,
        daniel@...earbox.net, martin.lau@...ux.dev, song@...nel.org,
        yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
        sdf@...ichev.me, haoluo@...gle.com, jolsa@...nel.org, shuah@...nel.org
Subject: [PATCH bpf-next] selftests/bpf: Fix htab_update/reenter_update selftest failure

Since commit 31158ad02ddb ("rqspinlock: Add deadlock detection and recovery")
the updated path on re-entrancy now reports deadlock via
-EDEADLK instead of the previous -EBUSY.

The selftest is updated to align with expected errno
with the kernel’s current behavior.

Signed-off-by: Saket Kumar Bhaskar <skb99@...ux.ibm.com>
---
 tools/testing/selftests/bpf/prog_tests/htab_update.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/htab_update.c b/tools/testing/selftests/bpf/prog_tests/htab_update.c
index 2bc85f4814f4..98d52bb1446f 100644
--- a/tools/testing/selftests/bpf/prog_tests/htab_update.c
+++ b/tools/testing/selftests/bpf/prog_tests/htab_update.c
@@ -40,7 +40,7 @@ static void test_reenter_update(void)
 	if (!ASSERT_OK(err, "add element"))
 		goto out;
 
-	ASSERT_EQ(skel->bss->update_err, -EBUSY, "no reentrancy");
+	ASSERT_EQ(skel->bss->update_err, -EDEADLK, "no reentrancy");
 out:
 	htab_update__destroy(skel);
 }
-- 
2.51.0