[PATCH 0/3] genirq: oneshot-safe threaded EOIs
From: Samuel Holland
Date: Sat Nov 26 2022 - 18:42:06 EST
This is the optimization that I promised back in
https://lore.kernel.org/lkml/20220701202440.59059-1-samuel@xxxxxxxxxxxx/
and got back around to cleaning up. To quote that cover letter:
"A further optimization is to take advantage of the fact that multiple
IRQs can be claimed at once. This allows removing the mask operations
for oneshot IRQs -- i.e. the combination of IRQCHIP_ONESHOT_SAFE and
IRQCHIP_EOI_THREADED, which is not currently supported."
Or in other words, we reuse the oneshot infrastructure for EOIs instead
of masking.
There a a few functions/variables that probably should be renamed now
that I have muddied what "oneshot" means. I elected not to do that in
this version to avoid distracting from the functional changes.
Samuel Holland (3):
genirq: Simplify cond_unmask_eoi_irq()
genirq: Add support for oneshot-safe threaded EOIs
irqchip/sifive-plic: Enable oneshot-safe threaded EOIs
drivers/irqchip/irq-sifive-plic.c | 2 ++
kernel/irq/chip.c | 21 ++++++++++++---------
kernel/irq/manage.c | 15 ++++++++++-----
3 files changed, 24 insertions(+), 14 deletions(-)
--
2.37.4