Re: [PATCH 01/16] mm: use untagged_addr() for get_user_pages_fast addresses
From: Christoph Hellwig <hch@lst.de>
Date: 2019-06-25 07:41:44
Also in:
linux-mips, linux-mm, linux-sh, lkml, sparclinux
On Fri, Jun 21, 2019 at 10:39:11AM -0300, Jason Gunthorpe wrote:
Hmm, this function, and the other, goes on to do:
if (unlikely(!access_ok((void __user *)start, len)))
return 0;
and I thought that access_ok takes in the tagged pointer?
How about re-order it a bit?The patch doesn't really work as-as an misses the main get_user_pages_fast fast path, but I'll add something equivalent.