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* [PATCH RT 0/3] riscv: add PREEMPT_RT support
@ 2023-05-10 16:24 Jisheng Zhang
  2023-05-10 16:24 ` [PATCH RT 1/3] asm-generic/preempt: also check preempt_lazy_count for should_resched() etc Jisheng Zhang
                   ` (3 more replies)
  0 siblings, 4 replies; 9+ messages in thread
From: Jisheng Zhang @ 2023-05-10 16:24 UTC (permalink / raw)
  To: Sebastian Andrzej Siewior, Thomas Gleixner, Schaffner Tobias,
	Paul Walmsley, Palmer Dabbelt, Albert Ou, Arnd Bergmann
  Cc: linux-riscv, linux-kernel, linux-arch

This series is to add PREEMPT_RT support to riscv. Compared with last
try[1], there are two major changes:

1. riscv has been converted to Generic Entry. And riscv uses
asm-generic/preeempt.h, so we need to patch asm-generic's preeempt to
enable lazy preempt support for riscv. This is what patch1 does.
However, it duplicates the preempt_lazy_count() defintion, I'm sure
there must be an elegant solution. Neverless, it doesn't impact the
riscv PREEMPT_RT support itself.

2. three preparation patches(patch1/2/3 in [1]) has been merged in
mainline.

I back-ported the lastest linux-6.3.y-rt patches to the lastest Linus tree,
then cook this series.

Link: https://lore.kernel.org/linux-riscv/20220831175920.2806-1-jszhang@kernel.org/

Jisheng Zhang (3):
  asm-generic/preempt: also check preempt_lazy_count for
    should_resched() etc.
  riscv: add lazy preempt support
  riscv: Allow to enable RT

 arch/riscv/Kconfig                   | 2 ++
 arch/riscv/include/asm/thread_info.h | 5 ++++-
 arch/riscv/kernel/asm-offsets.c      | 1 +
 include/asm-generic/preempt.h        | 8 +++++++-
 4 files changed, 14 insertions(+), 2 deletions(-)

-- 
2.40.1


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^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2023-10-31 15:34 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-05-10 16:24 [PATCH RT 0/3] riscv: add PREEMPT_RT support Jisheng Zhang
2023-05-10 16:24 ` [PATCH RT 1/3] asm-generic/preempt: also check preempt_lazy_count for should_resched() etc Jisheng Zhang
2023-05-10 16:24 ` [PATCH RT 2/3] riscv: add lazy preempt support Jisheng Zhang
2023-05-10 16:24 ` [PATCH RT 3/3] riscv: Allow to enable RT Jisheng Zhang
2023-10-23 16:33 ` [PATCH RT 0/3] riscv: add PREEMPT_RT support Schaffner, Tobias
2023-10-23 16:40   ` Jisheng Zhang
2023-10-24  6:18     ` Sebastian Andrzej Siewior
2023-10-31 14:43       ` Jisheng Zhang
2023-10-31 15:34         ` Sebastian Andrzej Siewior

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