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Wed, 20 May 2026 09:22:45 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 20 May 2026 09:22:45 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Juergen Christ Cc: Peter Zijlstra , Yang Shi , Shrikanth Hegde , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v3 6/9] s390/percpu: Use new percpu code section for arch_this_cpu_[and|or]() Date: Wed, 20 May 2026 11:22:40 +0200 Message-ID: <20260520092243.264847-7-hca@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260520092243.264847-1-hca@linux.ibm.com> References: <20260520092243.264847-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIwMDA4NyBTYWx0ZWRfX7pwQOesG7DSE XKu+Xy2xN4h7La33DO6ZukiV36H9KxfuXexTkp25VXa4SQx5rVtQMCxHyXM9SVtY0sLh+xKSvMm Zwsy3L+ZmONZABaMd7z5uf6fhblYI+UYKzkxaz/TlytCtyM5VNOMOMZvz8uRrzO38CrUsUxmaZ0 liH6MXnzDdksk8zSUCgC/rMY/fJjIDhecMG/CDE4UqXzrJV7g5xhZndS342I6MS4zcLWFX+tx3B 1fQJtqUwa0n07wHLqfOagCj+PBP7a774Vf7GxXQBd6Eu2lVZhh6WKeDf8vvJo+1tW/B1JLSW8Vk r9aa9Kb35z5tspFDoGwUO5CETfo/8FrP5Szd/7C+vfActyWk3Ro0VNMq62tWwDWv/wOkknEM3ZE yyfGsVRNp6u5OoaZXmdKn1Ge5lp9o9u73vHmy+V+oZwtmSlyfa+pHFvCqfhHnt030lVi5tqtw9H 8EnC726M3fNpUgP95Mw== X-Authority-Analysis: v=2.4 cv=Np/htcdJ c=1 sm=1 tr=0 ts=6a0d7d69 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=4dLYTkTKlH5g-JvQF6AA:9 X-Proofpoint-ORIG-GUID: 99llkpKqlZUeiKNSlUI_LsE7omIaqKMU X-Proofpoint-GUID: 99llkpKqlZUeiKNSlUI_LsE7omIaqKMU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-20_01,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605200087 Convert arch_this_cpu_[and|or]() to make use of the new percpu code section infrastructure. There is no user of this_cpu_and() and only one user of this_cpu_or() within the kernel. Therefore this conversion has hardly any effect, and also removes only preempt_schedule_notrace() function call. Signed-off-by: Heiko Carstens --- arch/s390/include/asm/percpu.h | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h index b3da863954c5..fa3dc3de5f8b 100644 --- a/arch/s390/include/asm/percpu.h +++ b/arch/s390/include/asm/percpu.h @@ -208,17 +208,29 @@ do { \ #define arch_this_cpu_to_op(pcp, val, op) \ do { \ + unsigned long lc_pcpr, lc_pcpo; \ typedef typeof(pcp) pcp_op_T__; \ pcp_op_T__ val__ = (val); \ pcp_op_T__ old__, *ptr__; \ - preempt_disable_notrace(); \ - ptr__ = raw_cpu_ptr(&(pcp)); \ - asm volatile( \ - op " %[old__],%[val__],%[ptr__]" \ - : [old__] "=d" (old__), [ptr__] "+Q" (*ptr__) \ - : [val__] "d" (val__) \ + \ + lc_pcpr = offsetof(struct lowcore, percpu_register); \ + lc_pcpo = offsetof(struct lowcore, percpu_offset); \ + ptr__ = PERCPU_PTR(&(pcp)); \ + asm_inline volatile( \ + MVIY_PERCPU("%[disppcpr]", "%[dispaltpcpr]", "%[ptr__]")\ + AG_ALT("%[disppcpo]", "%[dispaltpcpo]", "%[ptr__]") \ + op " %[old__],%[val__],0(%[ptr__])\n" \ + MVIY_ALT("%[disppcpr]", "%[dispaltpcpr]", "%%r0") \ + : [old__] "=&d" (old__), \ + [ptr__] "+&a" (ptr__), "+m" (*ptr__), \ + "=m" (((struct lowcore *)0)->percpu_register) \ + : [val__] "d" (val__), \ + [disppcpr] "i" (lc_pcpr), \ + [disppcpo] "i" (lc_pcpo), \ + [dispaltpcpr] "i" (lc_pcpr + LOWCORE_ALT_ADDRESS), \ + [dispaltpcpo] "i" (lc_pcpo + LOWCORE_ALT_ADDRESS), \ + "m" (((struct lowcore *)0)->percpu_offset) \ : "cc"); \ - preempt_enable_notrace(); \ } while (0) #define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, "lan") -- 2.51.0