riscv: irq: Fix no prototype warning

Fix the following W=1 kernel compilation warning:
arch/riscv/kernel/irq.c:19:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
   19 | void __init init_IRQ(void)
      |             ^~~~~~~~

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

diff --git a/arch/riscv/include/asm/irq.h b/arch/riscv/include/asm/irq.h
index 9807ad164015e5a08d4d2e90e407f5fc78c87a7f..e4c435509983e544f73150ef4f6e7bd5a7267c85 100644 (file)
--- a/arch/riscv/include/asm/irq.h
+++ b/arch/riscv/include/asm/irq.h
@@ -12,4 +12,6 @@
 
 #include <asm-generic/irq.h>
 
+extern void __init init_IRQ(void);
+
 #endif /* _ASM_RISCV_IRQ_H */