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Wed, 28 Oct 2026 10:56:40 +0000 (GMT) Received: from [0.0.0.0] (unknown [9.111.73.9]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 28 Oct 2026 10:56:40 +0000 (GMT) Message-ID: <72bd0cb0-2c5e-4c51-b68a-499ab96689fa@linux.ibm.com> Date: Wed, 28 Oct 2026 11:56:39 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 03/10] s390/bpf: Serialize text patching with text_mutex To: Heiko Carstens , Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org References: <20261027143030.3154657-1-hca@linux.ibm.com> <20261027143030.3154657-4-hca@linux.ibm.com> Content-Language: en-US From: Ilya Leoshkevich In-Reply-To: <20261027143030.3154657-4-hca@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=P8SvFSAu c=1 sm=1 tr=0 ts=6ae1d4ed cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=Yp5wXM3k0iUQaFnxeTgA:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 X-Proofpoint-GUID: 85FYskONHFN3onAgQTPJ0EW8SZGl86x1 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI4MDA0MiBTYWx0ZWRfX1sj7e3ycHmB9 I4XhlKlyCzSyEsQ/fE/3lx7us8tTuByoa/CR9uzT3v4sHsZnWE/c9zMLGH00j604Ba4CvZmf/kf Yk0DhCg3DCr7ePQmL8MqQoGXAYgZb7M= X-Proofpoint-ORIG-GUID: 85FYskONHFN3onAgQTPJ0EW8SZGl86x1 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI4MDA0MiBTYWx0ZWRfX0J0gZddOOnnY YroByeSmRJwJ6Qhn9vjVbF3j/IRjOSAWwyHzTenOPNe61X8FKrXvHogdxWZvlmpHjqIhpllI8wh 3ljjuTUpEh0/N2iX8ExW9xe0lsfwYatVTZT4b7z5z4J+u/4sdHJSUwbqQD7tAzG6JSIjdcZ+CEA Y68xJj4IKLImeasQkhpoo2JJuHzY/K5473+xkyEzbVPkVdRw/oSrhNxaOh90P8lU33cRNAOc+Je xtjtzu3KX0V8ZA4wp1t3BEqnjpbQwkbFteA9bZ7rMnzNANvxDZP3IQ2edOYOxY2PtUHAUTohLYi B4Fr5DvQu8bdASCEIcrO4ZzIfhoeU+WWN5SfVXZ2NqT9ibExvoCgKxryLPg72/vEkznDlujVeSp 0T45xpXdjQnrSvz51QgYhpsehCcl5HGTU+q3uV/qOk+6mZQaKaRULz4mc+K8DTo70VNhvu5gvYl OK2zOL1kcCWHoKUjX/w== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-28_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 malwarescore=0 phishscore=0 spamscore=0 clxscore=1015 bulkscore=0 suspectscore=0 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610280042 On 10/27/26 15:30, Heiko Carstens wrote: > Acquire text_mutex in bpf_arch_text_poke(). This way s390 uses text_mutex > like most other architectures. > > This is part of larger series where at the end s390_kernel_write() > requires that callers hold text_mutex for serialization. > > Signed-off-by: Heiko Carstens > --- > arch/s390/net/bpf_jit_comp.c | 21 +++++++++++++++++---- > 1 file changed, 17 insertions(+), 4 deletions(-) Reviewed-by: Ilya Leoshkevich