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riscv: Fix irq_work when SMP is disabled

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commit 2273272823 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: 298447928b ("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>
This commit is contained in:
Samuel Holland 2022-04-29 22:00:23 -05:00 committed by Greg Kroah-Hartman
parent 4a5c7a61ff
commit d2f3acde3d
1 changed files with 1 additions and 1 deletions
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2
arch/riscv/include/asm/irq_work.h
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@ -4,7 +4,7 @@
static inline bool arch_irq_work_has_interrupt(void) static inline bool arch_irq_work_has_interrupt(void)
{ {
return true; return IS_ENABLED(CONFIG_SMP);
} }
extern void arch_irq_work_raise(void); extern void arch_irq_work_raise(void);
#endif /* _ASM_RISCV_IRQ_WORK_H */ #endif /* _ASM_RISCV_IRQ_WORK_H */