Re: [PATCH 4/4] mm: vmalloc: convert vread() to vread_iter()

[Lorenzo Stoakes]

On Sun, Mar 19, 2023 at 02:50:56AM +0000, Matthew Wilcox wrote:
> On Sun, Mar 19, 2023 at 12:20:12AM +0000, Lorenzo Stoakes wrote:
> >  /* for /proc/kcore */
> > -extern long vread(char *buf, char *addr, unsigned long count);
> > +extern long vread_iter(char *addr, size_t count, struct iov_iter *iter);
>
> I don't love the order of the arguments here.  Usually we follow
> memcpy() and have (dst, src, len).  This sometimes gets a bit more
> complex when either src or dst need two arguments, but that's not the
> case here.

Indeed it's not delightful, I did this purely to mimic the order of
copy_to_iter() and friends which place iter last, however on second thoughts I
think placing iter first would be better here where we have the freedom to order
things more sensibly.

I'll respin with a fix.