Re: [PATCH -mm] mm, swap: Simplify total_swapcache_pages() with get_swap_device()

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To: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxx>
Subject: Re: [PATCH -mm] mm, swap: Simplify total_swapcache_pages() with get_swap_device()
From: Andrea Parri <andrea.parri@xxxxxxxxxxxxxxxxxxxx>
Date: Mon, 27 May 2019 15:28:57 +0200
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Hugh Dickins <hughd@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>, Jérôme Glisse <jglisse@xxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Daniel Jordan <daniel.m.jordan@xxxxxxxxxx>
In-reply-to: <20190527101536.GI28207@linux.ibm.com>
References: <20190527082714.12151-1-ying.huang@intel.com> <20190527101536.GI28207@linux.ibm.com>
User-agent: Mutt/1.5.24 (2015-08-30)

> But where do I find get_swap_device() and put_swap_device()?  I do not
> see them in current mainline.

You should see them in the -mm tree:

  https://ozlabs.org/~akpm/mmots/broken-out/mm-swap-fix-race-between-swapoff-and-some-swap-operations.patch

or

  http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/commit/?id=87efc56527b92a59d15c5d4e4b05f875b276a59a

Thanks,
  Andrea

References:
- [PATCH -mm] mm, swap: Simplify total_swapcache_pages() with get_swap_device()
  - From: Huang, Ying
- Re: [PATCH -mm] mm, swap: Simplify total_swapcache_pages() with get_swap_device()
  - From: Paul E. McKenney

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