On Thu, Aug 02, 2018 at 11:48:55AM +0200, Thomas Gleixner wrote:

quoted

diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S
index 9aaf6c986771..fa2c08e3c05e 100644
--- a/arch/riscv/kernel/entry.S
+++ b/arch/riscv/kernel/entry.S

@@ -168,8 +168,8 @@ ENTRY(handle_exception)
 
 	/* Handle interrupts */
 	move a0, sp /* pt_regs */
-	REG_L a1, handle_arch_irq
-	jr a1
+	move a1, s4 /* scause */
+	tail do_IRQ

What's the reason for doing the whole exception dance in ASM ?

I'll let Palmer defend it.  But for now I just want minimal changes
to actually get a booting system..