irqchip/gic-v3: fix system hang caused by ftrace

hulk inclusion
category: bugfix
bugzilla: 12844
CVE: NA

-------------------------------------------------

When gicv3_pseudo_nmi is enabled, the system will hang when excuting
"echo function_graph > /sys/kernel/debug/tracing/current_tracer".
In the gic_handle_irq(), function gic_read_iar() always return 1023 after
ftrace_caller() is called. The root reason leading to this is not located.
Set the function gic_handle_irq() as "notrace" to workaround this issue.
Signed-off-by: NWei Li <liwei391@huawei.com>
Reviewed-by: NCheng Jian <cj.chengjian@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/irqchip/irq-gic-v3.c

@@ -491,7 +491,8 @@ static inline void gic_handle_nmi(u32 irqnr, struct pt_regs *regs)
 		gic_deactivate_unhandled(irqnr);
 }
 
-static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
+static asmlinkage void __exception_irq_entry notrace
+gic_handle_irq(struct pt_regs *regs)
 {
 	u32 irqnr;