On Fri, Sep 28, 2018 at 09:15:03AM -0700, Christoph Hellwig wrote: > > +#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. if (unlikely(address >= VMALLOC_START) && unlikely(address <= VMALLOC_END)) { Ok, use checkpatch.pl. Best Regards Guo Ren