Re: [PATCH v4 1/3] mm: Don't pin ZERO_PAGE in pin_user_pages()

To: David Howells <dhowells@xxxxxxxxxx>
Subject: Re: [PATCH v4 1/3] mm: Don't pin ZERO_PAGE in pin_user_pages()
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 30 May 2023 20:57:32 -0700
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Lorenzo Stoakes <lstoakes@xxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxxxx>, Logan Gunthorpe <logang@xxxxxxxxxxxx>, Hillf Danton <hdanton@xxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
In-reply-to: <20230526214142.958751-2-dhowells@redhat.com>
References: <20230526214142.958751-1-dhowells@redhat.com> <20230526214142.958751-2-dhowells@redhat.com>

Looks good:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>

References:
- [PATCH v4 0/3] block: Make old dio use iov_iter_extract_pages() and page pinning
  - From: David Howells
- [PATCH v4 1/3] mm: Don't pin ZERO_PAGE in pin_user_pages()
  - From: David Howells