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Wed, 16 Jul 2025 09:48:11 +0000 (GMT) From: Shrikanth Hegde To: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, maddy@linux.ibm.com, will@kernel.org Cc: sshegde@linux.ibm.com, mark.rutland@arm.com, bigeasy@linutronix.de, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 0/1] powerpc, arm64: move preempt dynamic key into kernel/sched Date: Wed, 16 Jul 2025 15:17:44 +0530 Message-ID: <20250716094745.2232041-1-sshegde@linux.ibm.com> X-Mailer: git-send-email 2.43.5 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-GUID: 4ZzsJPwZ79ZXwGaz41k8LXOnSjIdcWG5 X-Authority-Analysis: v=2.4 cv=JOI7s9Kb c=1 sm=1 tr=0 ts=68777a9d cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=Wb1JkmetP80A:10 a=cMfPdojDCaELe1LC6y0A:9 X-Proofpoint-ORIG-GUID: 4ZzsJPwZ79ZXwGaz41k8LXOnSjIdcWG5 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzE2MDA4NyBTYWx0ZWRfXxseXy56oR2xP Ro5dB+r0rxy6hYoJw5vnymvDbhknESe6PeXTUWvp5DHBC2N563erNLiWIYixLA3LaehqZt3/+ED hAQ7hEZ4UX468X9HAWGmWPzdWLM4gkfUL6mRJIAPAZUkbo2TKx6dpl76vcHgvlTUWEiRZBq35CL GvHm/f42MeaiRtNfRzXpOepIZQLAzrfbZNQgdttGbNlp4jn+mrVRA9tSL1XlW2zdvYbS7HDPuj4 4pBBHoab1RGdBYvz4V9qEQ/uDUzsOdvSfnz67VcMBEP/j4q9H38tZqR9KddjrzVERTSep1QvAC+ TbTaq3+AkUeRT5zgls5HKb2XA9yXqu4UAY+devH9hq85brqcPoyYX7wwl7E2Qv5HSVvIR9K1DqP OatUde+g3/sEVKxI0FCcoDIuJT0rTp3/ZAyN9ytpthvPrVCDvqRaJAW5rZ5nvO4i5xRHNdES X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-07-16_01,2025-07-15_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 mlxlogscore=568 malwarescore=0 clxscore=1015 bulkscore=0 priorityscore=1501 mlxscore=0 spamscore=0 adultscore=0 impostorscore=0 suspectscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507160087 Current usage of preempt dynamic key is not specific to architecture and can be moved into sched/core instead. Most of the code around it looks similar. (same code for powerpc, arm64). Since preemption is more associated with scheduler rather than entry/exit, it is probably better it should be moved. This is tested on powerVM PREEMPT_DYNAMIC=y/n and on arm64 by Mark v1->v2: - Rebase to 6.16-rc6 - Collected the tags Ingo, Peter, Can this go via tip sched tree? Both arm64, powerpc have acked the changes and been tested. Shrikanth Hegde (1): sched: preempt: Move dynamic keys into kernel/sched arch/arm64/include/asm/preempt.h | 1 - arch/arm64/kernel/entry-common.c | 8 -------- arch/powerpc/include/asm/preempt.h | 16 ---------------- arch/powerpc/kernel/interrupt.c | 4 ---- include/linux/irq-entry-common.h | 1 - include/linux/sched.h | 8 ++++++++ kernel/entry/common.c | 1 - kernel/sched/core.c | 4 ++++ 8 files changed, 12 insertions(+), 31 deletions(-) delete mode 100644 arch/powerpc/include/asm/preempt.h -- 2.43.0