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Mon, 27 Apr 2026 04:47:34 +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 04:47:34 +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 2/4] powerpc: Simplify cpumask api usage for cpuinfo display Date: Mon, 27 Apr 2026 10:17:13 +0530 Message-ID: <20260427044715.559137-3-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: AW1haW4tMjYwNDI3MDA0OCBTYWx0ZWRfX0OaDGhOeNei1 iLIY4ThYGYegtUXewLql1PHQi4upCvjm4o2pWMUqY368MLpBTd3ejfZwFlK0NGEUlBS5vcanyN5 2A4iAUR+HC3OMoMfjEFN8YKCxee4o2jOL5+1+YlXhNLAiqsIWhEha/9QaTc8gyQNicIkp5wC5Kh L5afj2yF8TuEf29kDIPlIkQq9J6WQnHjmwM92HJcDw8VtZ2eGd18mxiL0/AvjV4yn6fwXE916uc 4gviuaRALt6Q2gFnQNipX7r6m3Xh+sWDvYGtzIFK37K9TRSymRUByndcODAIzvXnml4vqBbpNVS VvQ6BTKETBixMcaC0Sk/ABc1sDeF7LtSm4oktkoscg1a4b6IyE77IwRaMPDCIADyIMrgsjF9fUu t7q7ef3u6pKm1v6y2w6fZCLpDOSS0Gmpcxs73WDWo1pz9iwzWkoFggvPFX4LimEnI6IcfINa1ub ORVGT10s7Bjveqd+F0g== X-Proofpoint-GUID: Upc1uyxRodZwEuuCzkjlZBPKai3cfcaD X-Proofpoint-ORIG-GUID: 07IOpZuYhTq1HjwiYw6gPJX601WCmKBm X-Authority-Analysis: v=2.4 cv=MohiLWae c=1 sm=1 tr=0 ts=69eeea6d cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=Ikd4Dj_1AAAA:8 a=VnNF1IyMAAAA:8 a=1TO9j2vGO00jYUTp9YQA: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=1011 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 - cpumask_next can take -1 as valid argument. So simplify cpuinfo iterator. - Use cpumask_last to find if this_cpu is last online CPU. /proc/cpuinfo shows same info with patch. Reviewed-by: Yury Norov Signed-off-by: Shrikanth Hegde --- arch/powerpc/kernel/setup-common.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 8a86b0efcb1c..aecabe9cf139 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -323,7 +323,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_putc(m, '\n'); /* If this is the last cpu, print the summary */ - if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) + if (cpu_id == cpumask_last(cpu_online_mask)) show_cpuinfo_summary(m); return 0; @@ -331,10 +331,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) static void *c_start(struct seq_file *m, loff_t *pos) { - if (*pos == 0) /* just in case, cpu 0 is not the first */ - *pos = cpumask_first(cpu_online_mask); - else - *pos = cpumask_next(*pos - 1, cpu_online_mask); + *pos = cpumask_next(*pos - 1, cpu_online_mask); if ((*pos) < nr_cpu_ids) return (void *)(unsigned long)(*pos + 1); return NULL; -- 2.47.3