| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.18 008/879] riscv: Fix irq_work when SMP is disabled | Date | Tue, 7 Jun 2022 18:52:06 +0200 |
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From: Samuel Holland <samuel@sholland.org>
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@sholland.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220430030025.58405-1-samuel@sholland.org Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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 */
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