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riscv: print the unexpected interrupt cause

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This has been helpful when debugging my pending nommu port.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nick Kossifidis <mick@ics.forth.gr>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Christoph Hellwig 2019-04-15 11:14:41 +02:00 • committed by Palmer Dabbelt
commit bed1378706
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1 changed files with 2 additions and 1 deletions
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arch/riscv/kernel/irq.c
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@ -54,7 +54,8 @@ asmlinkage void __irq_entry do_IRQ(struct pt_regs *regs)
handle_arch_irq(regs);
break;
default:
panic("unexpected interrupt cause");
pr_alert("unexpected interrupt cause 0x%lx", regs->scause);
BUG();
}
irq_exit();