[PATCH Dovetail v2 2/2] arm64: irq_pipeline: Cleanup demotion check for el1

While reviewing some of the low level pipeline code I realized that
the checks for task demotion are confusing on arm64.

el0: There is no demotion check as arm6_exit_to_user_mode() will
     already do the right thing. No need to update that path.

el1: The demotion check was unnecessary and "inactive" as
     user_mode(regs) is never true on el1, we are serving an IRQ over
     kernel mode. Removing the check to avoid further confusion.

Signed-off-by: Florian Bezdeka <[email protected]>
---
 arch/arm64/kernel/entry-common.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
index 07fa70713ce04eaf3df9223354babcecde923280..2337987b7edd88d36703071ba0ac9880d043b5e5 100644
--- a/arch/arm64/kernel/entry-common.c
+++ b/arch/arm64/kernel/entry-common.c
@@ -90,10 +90,6 @@ static noinstr void arm64_pipeline_el1_irq(struct pt_regs *regs,
 		prevd = handle_irq_pipelined_prepare(regs);
 		do_interrupt_handler(regs, handler);
 		handle_irq_pipelined_finish(prevd, regs);
-		if (running_inband() && user_mode(regs)) {
-			stall_inband_nocheck();
-			irqentry_exit_to_user_mode(regs);
-		}
 		instrumentation_end();
 		mte_check_tfsr_exit();
 		return;

-- 
2.53.0