From: David Laight <David.Laight@ACULAB.COM>
To: 'Arnd Bergmann' <arnd@kernel.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
Christoph Hellwig <hch@infradead.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
Eric Biederman <ebiederm@xmission.com>,
Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>
Subject: RE: [PATCH v3 2/4] mm: simplify compat_sys_move_pages
Date: Tue, 18 May 2021 20:49:34 +0000 [thread overview]
Message-ID: <f52b8bc9600443dab1814766552fe6bf@AcuMS.aculab.com> (raw)
In-Reply-To: <20210517203343.3941777-3-arnd@kernel.org>
From: Arnd Bergmann
> Sent: 17 May 2021 21:34
>
> The compat move_pages() implementation uses compat_alloc_user_space()
> for converting the pointer array. Moving the compat handling into
> the function itself is a bit simpler and lets us avoid the
> compat_alloc_user_space() call.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> mm/migrate.c | 45 ++++++++++++++++++++++++++++++---------------
> 1 file changed, 30 insertions(+), 15 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index b234c3f3acb7..a68d07f19a1a 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -1855,6 +1855,23 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages,
> mmap_read_unlock(mm);
> }
>
> +static int put_compat_pages_array(const void __user *chunk_pages[],
> + const void __user * __user *pages,
> + unsigned long chunk_nr)
> +{
Should that be get_compat_pages_array() ?
David
-
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next prev parent reply other threads:[~2021-05-18 20:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 20:33 [PATCH v3 0/4] compat: remove compat_alloc_user_space callers Arnd Bergmann
2021-05-17 20:33 ` [PATCH v3 1/4] kexec: simplify compat_sys_kexec_load Arnd Bergmann
2021-05-18 3:57 ` Eric W. Biederman
2021-05-18 6:40 ` Christoph Hellwig
2021-05-18 7:44 ` Arnd Bergmann
2021-05-18 6:38 ` Christoph Hellwig
2021-05-18 7:47 ` Arnd Bergmann
2021-05-18 13:41 ` Eric W. Biederman
2021-05-18 14:05 ` Arnd Bergmann
2021-05-18 14:17 ` Arnd Bergmann
2021-05-18 16:01 ` Eric W. Biederman
2021-05-18 22:45 ` Eric W. Biederman
2021-05-19 9:55 ` Arnd Bergmann
2021-05-18 20:47 ` David Laight
2021-05-17 20:33 ` [PATCH v3 2/4] mm: simplify compat_sys_move_pages Arnd Bergmann
2021-05-18 6:42 ` Christoph Hellwig
2021-05-18 20:49 ` David Laight [this message]
2021-05-19 13:41 ` Arnd Bergmann
2021-05-17 20:33 ` [PATCH v3 3/4] mm: simplify compat numa syscalls Arnd Bergmann
2021-05-18 6:52 ` Christoph Hellwig
2021-05-17 20:33 ` [PATCH v3 4/4] compat: remove some compat entry points Arnd Bergmann
2021-05-18 6:55 ` Christoph Hellwig
2021-05-19 20:33 ` Thomas Gleixner
2021-05-19 21:00 ` Arnd Bergmann
2021-05-20 9:21 ` Arnd Bergmann
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