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Mon, 27 Apr 2026 04:47:37 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 63R4lYpc25100718 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 27 Apr 2026 04:47:34 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5625720043; Mon, 27 Apr 2026 04:47:34 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8B76620040; Mon, 27 Apr 2026 04:47:32 +0000 (GMT) Received: from li-7bb28a4c-2dab-11b2-a85c-887b5c60d769.ibm.com (unknown [9.123.5.233]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 27 Apr 2026 04:47:32 +0000 (GMT) From: Shrikanth Hegde To: maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, yury.norov@gmail.com, linux@rasmusvillemoes.dk, linux-kernel@vger.kernel.org Cc: sshegde@linux.ibm.com, chleroy@kernel.org, Yury Norov Subject: [PATCH v2 1/4] powerpc: Use cpumask_next_wrap instead Date: Mon, 27 Apr 2026 10:17:12 +0530 Message-ID: <20260427044715.559137-2-sshegde@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260427044715.559137-1-sshegde@linux.ibm.com> References: <20260427044715.559137-1-sshegde@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI3MDA0OCBTYWx0ZWRfX6Wg8xyUMudNR r1AHEBiMNDups3u8EhHWs9cvL7DthLLU1z4FL9KyRVLnlNeRL5rzw5cAZqZcMD1zNrzWlNvIwEZ DUhEdP4zlfW5V6e/mny6+bgPjiJOf4m/nKMVOFcppa3ADS2I+3rLjzH5xMId8O1ZGt6xCiZl2Yw roDs/IMfzMBYK5QkwvG2bX9M8wi3adhbexXBrIxhd9BRj7kBt/hjt2tRFdn+ryBUARKAHRoLIwY SQPYcIGEnfobZg1qne85Q4pHURb4J4efhBL93w1tXBsaKA7jdte4a14wbLkHZyEeiVuiO7QamYO lUBYq9TEbDDuTFLga2geR95S3qhyt6dKfT0cd2pbyWkqqmTPRKNW3O15aytFPWAneuhSbIBNe5N w16ZRsbsHS9scIQlRl4OfKUUopTal/tO3z5hva8vkV8JW+5dt8jHAUwi5/yt3o8h4fJ5xk2EPdO L6oh0lsR7W/EsfhlcBQ== X-Proofpoint-GUID: KFXTZrPnqT85lnGg5SS8bjLHyT-drC2b X-Proofpoint-ORIG-GUID: UkwPpNIjt16_QiddZzAt1P3xPH1XlK6E X-Authority-Analysis: v=2.4 cv=MohiLWae c=1 sm=1 tr=0 ts=69eeea6b cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8 a=ekXyIRwq0AQAqslM44EA:9 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=2026-04-27_01,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 suspectscore=0 bulkscore=0 spamscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604270048 cpu = cpumask_next(cpu, mask) if (cpu >= nr_cpu_ids) cpu = cpumask_first(mask) Above block is identical to: cpu = cpumask_next_wrap(cpu, mask) Replace it, No change in functionality or performance. Slightly simpler code. Reviewed-by: Yury Norov Signed-off-by: Shrikanth Hegde --- arch/powerpc/kernel/irq.c | 5 +---- arch/powerpc/mm/book3s64/hash_utils.c | 4 +--- 2 files changed, 2 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index a0e8b998c9b5..f69de08ad347 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -370,10 +370,7 @@ int irq_choose_cpu(const struct cpumask *mask) do_round_robin: raw_spin_lock_irqsave(&irq_rover_lock, flags); - irq_rover = cpumask_next(irq_rover, cpu_online_mask); - if (irq_rover >= nr_cpu_ids) - irq_rover = cpumask_first(cpu_online_mask); - + irq_rover = cpumask_next_wrap(irq_rover, cpu_online_mask); cpuid = irq_rover; raw_spin_unlock_irqrestore(&irq_rover_lock, flags); diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index 9dc5889d6ecb..e4fcf929cb33 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -1299,9 +1299,7 @@ static void stress_hpt_timer_fn(struct timer_list *timer) if (!firmware_has_feature(FW_FEATURE_LPAR)) tlbiel_all(); - next_cpu = cpumask_next(raw_smp_processor_id(), cpu_online_mask); - if (next_cpu >= nr_cpu_ids) - next_cpu = cpumask_first(cpu_online_mask); + next_cpu = cpumask_next_wrap(raw_smp_processor_id(), cpu_online_mask); stress_hpt_timer.expires = jiffies + msecs_to_jiffies(10); add_timer_on(&stress_hpt_timer, next_cpu); } -- 2.47.3