Re: [PATCH] mm: simplify get_next_ra_size

[Matthew Wilcox]

On Sun, Oct 28, 2018 at 02:13:26PM +0800, Gao Xiang wrote:
> It's a trivial simplification for get_next_ra_size and
> clear enough for humans to understand.
> 
> It also fixes potential overflow if ra->size(< ra_pages) is too large.
> 
> Cc: Fengguang Wu <fengguang.wu@xxxxxxxxx>
> Signed-off-by: Gao Xiang <hsiangkao@xxxxxxx>

Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>

I also considered what would happen with underflow (passing a 'max'
less than 16, or less than 2) and it would seem to do the right thing
in that case.