From: Samuel Holland <samuel@xxxxxxxxxxxx>
commit 2273272823db6f67d57761df8116ae32e7f05bed upstream.
irq_work is triggered via an IPI, but the IPI infrastructure is not
included in uniprocessor kernels. As a result, irq_work never runs.
Fall back to the tick-based irq_work implementation on uniprocessor
configurations.
Fixes: 298447928bb1 ("riscv: Support irq_work via self IPIs")
Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220430030025.58405-1-samuel@xxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/include/asm/irq_work.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/include/asm/irq_work.h
+++ b/arch/riscv/include/asm/irq_work.h
@@ -4,7 +4,7 @@
static inline bool arch_irq_work_has_interrupt(void)
{
- return true;
+ return IS_ENABLED(CONFIG_SMP);
}
extern void arch_irq_work_raise(void);
#endif /* _ASM_RISCV_IRQ_WORK_H */
