This is a note to let you know that I've just added the patch titled
genirq: GENERIC_IRQ_IPI depends on SMP
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
genirq-generic_irq_ipi-depends-on-smp.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b99167fa29891e13cbc549090567ccfbd5a1dacd
Author: Samuel Holland <samuel@xxxxxxxxxxxx>
Date: Fri Jul 1 15:00:50 2022 -0500
genirq: GENERIC_IRQ_IPI depends on SMP
[ Upstream commit 0f5209fee90b4544c58b4278d944425292789967 ]
The generic IPI code depends on the IRQ affinity mask being allocated
and initialized. This will not be the case if SMP is disabled. Fix up
the remaining driver that selected GENERIC_IRQ_IPI in a non-SMP config.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220701200056.46555-3-samuel@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 9d3812cd668e..85099cff62eb 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -153,7 +153,7 @@ config IMGPDC_IRQ
config IRQ_MIPS_CPU
bool
select GENERIC_IRQ_CHIP
- select GENERIC_IRQ_IPI if SYS_SUPPORTS_MULTITHREADING
+ select GENERIC_IRQ_IPI if SMP && SYS_SUPPORTS_MULTITHREADING
select IRQ_DOMAIN
select IRQ_DOMAIN_HIERARCHY if GENERIC_IRQ_IPI
select GENERIC_IRQ_EFFECTIVE_AFF_MASK
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index d532bf0c5a67..81473974b1d5 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -80,6 +80,7 @@ config IRQ_FASTEOI_HIERARCHY_HANDLERS
# Generic IRQ IPI support
config GENERIC_IRQ_IPI
bool
+ depends on SMP
select IRQ_DOMAIN_HIERARCHY
# Generic MSI interrupt support
