linux-kernel - [PATCH v2 0/1] powerpc, arm64: move preempt dynamic key into kernel/sched

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Message-ID: <20250716094745.2232041-1-sshegde@linux.ibm.com>
Date: Wed, 16 Jul 2025 15:17:44 +0530
From: Shrikanth Hegde <sshegde@...ux.ibm.com>
To: mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de,
        maddy@...ux.ibm.com, will@...nel.org
Cc: sshegde@...ux.ibm.com, mark.rutland@....com, bigeasy@...utronix.de,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 0/1] powerpc, arm64: move preempt dynamic key into kernel/sched

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