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Date:   Thu, 16 May 2019 19:00:35 +0200
From:   Michal Koutný <>
To:     Konstantin Khlebnikov <>
Subject: Re: mm: use down_read_killable for locking mmap_sem in

On Wed, May 15, 2019 at 11:48:32AM +0300, Konstantin Khlebnikov <> wrote:
> This function ignores any error like reading from unmapped area and
> returns only size of successful transfer. It never returned any error codes.
This is a point I missed. Hence no need to adjust consumers of
__access_remote_vm() (they won't actually handle -EINTR correctly w/out
further changes). This beats my original idea with simplicity.

Reviewed-by: Michal Koutný <>


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