[lustre-devel] [PATCH 030/124] staging: lustre: llite: Replace write mutex with range lock

[Greg Kroah-Hartman]

On Sun, Sep 18, 2016 at 04:37:29PM -0400, James Simmons wrote:
> + * Range lock is used to allow multiple threads writing a single shared
> + * file given each thread is writing to a non-overlapping portion of the
> + * file.
> + *
> + * Refer to the possible upstream kernel version of range lock by
> + * Jan Kara <jack at suse.cz>: https://lkml.org/lkml/2013/1/31/480
> + *
> + * This file could later replaced by the upstream kernel version.

It doesn't look like range_lock ever got accepted in the kernel tree,
any idea what happened to it?  Having a per-filesystem lock type seems
odd to me...

thanks,

greg k-h