[PATCH v2] riscv: add tracepoints for page fault

[Matthew Wilcox]

On Wed, Jul 17, 2024 at 08:27:19AM +0000, Zhu Hengbo wrote:
> +	TP_STRUCT__entry(
> +		__field(unsigned long, address)
> +		__field(unsigned long, epc)
> +		__field(unsigned long, cause)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->address	= regs->badaddr;
> +		__entry->epc		= regs->epc;
> +		__entry->cause		= regs->cause;
> +	),
> +
> +	TP_printk("user page fault, address=%ps epc=%ps cause=0x%lx",
> +			(void *)__entry->address, (void *)__entry->epc,
> +			__entry->cause)

What is "epc"?  You've made this gratuitously different from x86.
Never do that.  Always copy what somebody else has done unless you have
a good reason to be different.