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Wed, 28 Oct 2026 12:25:04 +0000 (GMT) Received: from [0.0.0.0] (unknown [9.111.73.9]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 28 Oct 2026 12:25:04 +0000 (GMT) Message-ID: Date: Wed, 28 Oct 2026 13:25:04 +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 08/10] s390/alternative: 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> <20261027143030.3154657-9-hca@linux.ibm.com> Content-Language: en-US From: Ilya Leoshkevich In-Reply-To: <20261027143030.3154657-9-hca@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI4MDA0OCBTYWx0ZWRfX14plyNZ4YFLH ruxWsAtkS5PSwdEGKzkOAthykQSXoh/3DJEA95gY37D0CZ+Dx6g7D1XrlxXlDy0pCh3ma7iX53j LbQAfyO9SQZNMoQjJwgL7PoimdVNMXc= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI4MDA0OCBTYWx0ZWRfX/WbqcPByJdlJ Fm1IMjuJFPN4qG4qvzQDoVBXo0wGFmnIGftHqMOc5gk9SwX6zlPRANUBrfN6dIDFtjYTb1OwecI e1XOFPydJzbTALs7sm4gvQ6oMpTbZ9yEAZ9rsAx9Sarf/Muc/kisuACWkeShwmLvCVRDzFe6o8w njiKgDrauqKpDumzvOg3DRgSTZtoclS6Xae+K6qqIvSZBi1N7UqrYJXGasAZUwwl4aRPmL7QqYh 0K/LpLErytd2E7s0DTg12b48T90Hd8qZpItJxOul83L8DUEuTEvFnLfI+ovbUoPSCvM0XQfJhH0 vl4yb+q0phRVC/QF4L+SudrCndIe8ouTFnPtwQBhPYqCMM+Sbe2eA/ruFElyKpEJRCB+NBe4YAu BcdNmWT6zSVXN3oG4Z3YgBgi2BNiPtTpN3xd4eAKxd5epd4x1uU6vSmWQoaEZhtpjGvV40OnXJ8 4VE2eWKG5pCqoDdH1gg== X-Proofpoint-ORIG-GUID: wWZLr-p43YW3C8gV-MahScC2_ycUrXQp X-Authority-Analysis: v=2.4 cv=Uu32pOwB c=1 sm=1 tr=0 ts=6ae1e9a5 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=lFAPrgHvWctSVXuBu1YA:9 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 X-Proofpoint-GUID: wWZLr-p43YW3C8gV-MahScC2_ycUrXQp 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_04,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 priorityscore=1501 spamscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 suspectscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610280048 On 10/27/26 15:30, Heiko Carstens wrote: > Acquire text_mutex inside __apply_alternatives() around the patching > loop. > > Serialization is not required for __apply_alternatives(), however this is > part of larger series where at the end s390_kernel_write() requires that > callers hold text_mutex. > > Signed-off-by: Heiko Carstens > --- > arch/s390/kernel/alternative.c | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Ilya Leoshkevich