On Sat, Feb 29, 2020 at 11:25:49PM +0800, qiwuchen55@xxxxxxxxx wrote: > +++ b/mm/memory.c > @@ -1948,8 +1948,8 @@ static inline int remap_p4d_range(struct mm_struct *mm, pgd_t *pgd, > * remap_pfn_range - remap kernel memory to userspace > * @vma: user vma to map to > * @addr: target user address to start at > - * @pfn: physical address of kernel memory > - * @size: size of map area > + * @pfn: remap pfn converted by physical address of kernel memory I think that's actually worse. How about: * @pfn: Page Frame Number of memory.
