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Tue, 25 Aug 2026 16:58:41 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with SMTP; Tue, 25 Aug 2026 16:58:40 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55669) id E87041624DF; Tue, 25 Aug 2026 18:58:40 +0200 (CEST) From: Alexander Gordeev To: Steven Rostedt , Masami Hiramatsu , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 2/2] ftrace/selftests: Change non-unique test symbol to init_once Date: Tue, 25 Aug 2026 18:58:40 +0200 Message-ID: <67ac21cd214ec9371276df9ba790e9832cf328d4.1787670777.git.agordeev@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: oIEdb3RxQilDwhfP4QwBtt77HocaKNWq X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI1MDE0MSBTYWx0ZWRfX9uiPNoMPNqsA lUdTc03cE4kTJKZW88wHOPEl7+0AqCqoB1k4VnN3tpLLTvkeNWBB5vk3NCKF2tfgr45F+xX0mIZ IzMfUSvwA0X9L1KVZCSqbILnKDX2mLPG2EnDmk9SNwzDt/87HXMhbZM6luoqPGjZJ13F0Th2qoU ZtBJChgwiWt1GYtktc79V5CE2xjbRHZlXr1PYHXa+9fSlVDpjz8GgtsQWoqW46OzPDmf3kARrv1 hwYzj/ZLp31GSZS/gyEHlg89EWQdiXDvjBjrJ2fkaWJRgiBFu2pXYCIQAbbr1OSHtybsyBPKwmJ Py742/yDFbyS8hHC77z6D/gsfu/4NAllWcwW9UAcKdTS8L2ofxt1kTKiy33KlSe7z5EJ2zA9lMf bxQhJtcleLbgliY3qz0kD1ZYEMDBMCT0bs8k+HlMF+AUOzIrA0h/bTsodXWWMV7I1ukNEDT6cVi 0qK9RwWsWnD0Eno3PIQ== X-Authority-Analysis: v=2.4 cv=Y/nIdBeN c=1 sm=1 tr=0 ts=6a8dc9c4 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=eIpQDs71oAkVvSjDqUcA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI1MDE0MSBTYWx0ZWRfX2v6NQVJD+odY xdFztU/MFZvhySeWVX4ppag9fUqwGU0FbfdqB7ToZmD2K10OsO0gwGvx1CGPezCgcQXE8/y2xEg Br9AYfrF72omlWcJfV0YyRG7RQwi4hk= X-Proofpoint-ORIG-GUID: oIEdb3RxQilDwhfP4QwBtt77HocaKNWq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-25_04,2026-08-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 priorityscore=1501 adultscore=0 bulkscore=0 suspectscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608250141 The name_show symbol is not the best choise, because it often appears only three times on s390 in kallsyms, with two of them having module annotations [mdev] and [i2c_core]. Switch to init_once which has many more duplicate instances all in vmlinux, making it a more reliable non-unique symbol for testing kprobe registration failure. Signed-off-by: Alexander Gordeev --- .../selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq= _symbol.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq= _symbol.tc index 07b1177c1634..03eb9e70b438 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol= .tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol= .tc @@ -3,7 +3,7 @@ # description: Test failure of registering kprobe on non unique symbol # requires: kprobe_events =20 -SYMBOL=3D'name_show' +SYMBOL=3D'init_once' =20 # We skip this test on kernel where SYMBOL is unique or does not exist. if [ "$(grep -c -E "[[:alnum:]]+ t ${SYMBOL}$" /proc/kallsyms)" -le '1' = ]; then --=20 2.53.0