Re: [PATCH V6 04/33] csky: Exception handling and mm-fault

[Christoph Hellwig]

> +#ifndef CONFIG_CPU_HAS_TLBI
> +	/*
> +	 * We fault-in kernel-space virtual memory on-demand. The
> +	 * 'reference' page table is init_mm.pgd.
> +	 *
> +	 * NOTE! We MUST NOT take any locks for this case. We may
> +	 * be in an interrupt or a critical region, and should
> +	 * only copy the information from the master page table,
> +	 * nothing more.
> +	 */
> +	if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
> +	{

This doesn't fir the kernel style.  Please run checkpatch.pl over
your code and fix at least all warnings that don't seem clearly bogus.