6.17-stable review patch. If anyone has any objections, please let me know.
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From: Brian Norris briannorris@chromium.org
[ Upstream commit 0c888bc86d672e551ce5c58b891c8b44f8967643 ]
Some architectures have a static interrupt layout, with a limited number of interrupts. Without SPARSE_IRQ, the test may not be able to allocate any fake interrupts, and the test will fail. (This occurs on ARCH=m68k, for example.)
Additionally, managed-affinity is only supported with CONFIG_SPARSE_IRQ=y, so irq_shutdown_depth_test() and irq_cpuhotplug_test() would fail without it.
Add a 'SPARSE_IRQ' dependency to avoid these problems.
Many architectures 'select SPARSE_IRQ', so this is easy to miss.
Notably, this also excludes ARCH=um from running any of these tests, even though some of them might work.
Fixes: 66067c3c8a1e ("genirq: Add kunit tests for depth counts") Reported-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Brian Norris briannorris@chromium.org Signed-off-by: Thomas Gleixner tglx@linutronix.de Tested-by: Guenter Roeck linux@roeck-us.net Reviewed-by: David Gow davidgow@google.com Link: https://lore.kernel.org/all/20250822190140.2154646-5-briannorris@chromium.or... Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/irq/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 08088b8e95ae9..a75df2bb9db66 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -147,6 +147,7 @@ config GENERIC_IRQ_KEXEC_CLEAR_VM_FORWARD config IRQ_KUNIT_TEST bool "KUnit tests for IRQ management APIs" if !KUNIT_ALL_TESTS depends on KUNIT=y + depends on SPARSE_IRQ default KUNIT_ALL_TESTS select IRQ_DOMAIN imply SMP