From: Catalin Marinas <catalin.marinas@arm.com>
To: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Oleg Nesterov <oleg@redhat.com>,
Richard Cochran <richardcochran@gmail.com>,
Jason Gunthorpe <jgg@nvidia.com>,
John Hubbard <jhubbard@nvidia.com>, Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH 4/4] mm/gup: adapt get_user_page_vma_remote() to never return NULL
Date: Mon, 2 Oct 2023 11:16:48 +0100 [thread overview]
Message-ID: <ZRqYkHXmiBg+PfQM@arm.com> (raw)
In-Reply-To: <b57d5f6618818f2f781a664039ace025c932074c.1696174961.git.lstoakes@gmail.com>
On Sun, Oct 01, 2023 at 05:00:05PM +0100, Lorenzo Stoakes wrote:
> get_user_pages_remote() will never return 0 except in the case of
> FOLL_NOWAIT being specified, which we explicitly disallow.
>
> This simplifies error handling for the caller and avoids the awkwardness of
> dealing with both errors and failing to pin. Failing to pin here is an
> error.
>
> Suggested-by: Arnd Bergmann <arnd@arndb.de>
> Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
> ---
> arch/arm64/kernel/mte.c | 4 ++--
For arm64:
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2023-10-02 10:17 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-01 16:00 [PATCH 0/4] various improvements to the GUP interface Lorenzo Stoakes
2023-10-01 16:00 ` [PATCH 1/4] mm: make __access_remote_vm() static Lorenzo Stoakes
2023-10-02 10:59 ` David Hildenbrand
2023-10-09 22:16 ` Jason Gunthorpe
2023-10-01 16:00 ` [PATCH 2/4] mm/gup: explicitly define and check internal GUP flags, disallow FOLL_TOUCH Lorenzo Stoakes
2023-10-02 11:00 ` David Hildenbrand
2023-10-09 22:19 ` Jason Gunthorpe
2023-10-01 16:00 ` [PATCH 3/4] mm/gup: make failure to pin an error if FOLL_NOWAIT not specified Lorenzo Stoakes
2023-10-02 11:04 ` David Hildenbrand
2023-10-02 22:51 ` Lorenzo Stoakes
2023-10-09 22:22 ` Jason Gunthorpe
2023-10-01 16:00 ` [PATCH 4/4] mm/gup: adapt get_user_page_vma_remote() to never return NULL Lorenzo Stoakes
2023-10-02 10:16 ` Catalin Marinas [this message]
2023-10-02 11:08 ` David Hildenbrand
2023-10-02 22:56 ` Lorenzo Stoakes
2023-10-09 22:24 ` Jason Gunthorpe
2023-10-01 17:39 ` [PATCH 0/4] various improvements to the GUP interface Arnd Bergmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZRqYkHXmiBg+PfQM@arm.com \
--to=catalin.marinas@arm.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=akpm@linux-foundation.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=arnd@arndb.de \
--cc=irogers@google.com \
--cc=jgg@nvidia.com \
--cc=jhubbard@nvidia.com \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lstoakes@gmail.com \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=oleg@redhat.com \
--cc=peterz@infradead.org \
--cc=richardcochran@gmail.com \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox