[PATCH v3 0/1] powerpc: Enable dynamic preemption

From: Shrikanth Hegde
Date: Mon Jan 06 2025 - 00:20:00 EST


Now that preempt=lazy patches[1] are in powerpc-next tree, sending out the
patch to support dynamic preemption based on DYNAMIC_KEY.

base: powerpc-next

Once the arch supports static inline calls, it would be needed to
evaluate to see if that gives better performance.

v2->v3:
- fixed a build error reported by linux test robot by including jump
label header.

v1->v2:
- Instead of copying asm-generic preempt.h content include it in
arch/asm preempt.h. (Christophe Leroy)
- Merge the patches into one patch (Christophe Leroy)

v1: https://lore.kernel.org/all/20241125042212.1522315-1-sshegde@xxxxxxxxxxxxx/
v2: https://lore.kernel.org/all/20250102191856.499424-1-sshegde@xxxxxxxxxxxxx/
[1]: https://lore.kernel.org/all/173572211264.1875638.9927288574435880962.b4-ty@xxxxxxxxxxxxx/

Shrikanth Hegde (1):
powerpc: Enable dynamic preemption

arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/preempt.h | 12 ++++++++++++
arch/powerpc/kernel/interrupt.c | 6 +++++-
arch/powerpc/kernel/traps.c | 6 +++++-
arch/powerpc/lib/vmx-helper.c | 2 +-
5 files changed, 24 insertions(+), 3 deletions(-)
create mode 100644 arch/powerpc/include/asm/preempt.h

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2.39.3