From mboxrd@z Thu Jan  1 00:00:00 1970
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Sat, 03 Aug 2019 07:06:40 +0000
Subject: Re: [PATCH 10/34] genwqe: convert put_page() to put_user_page*()
Message-Id: <20190803070640.GB2508@kroah.com>
List-Id: <linux-fbdev.vger.kernel.org>
References: <20190802022005.5117-1-jhubbard@nvidia.com>
 <20190802022005.5117-11-jhubbard@nvidia.com>
In-Reply-To: <20190802022005.5117-11-jhubbard@nvidia.com>
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To: john.hubbard@gmail.com
Cc: linux-fbdev@vger.kernel.org, Jan Kara <jack@suse.cz>, kvm@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>, Dave Chinner <david@fromorbit.com>, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Dan Williams <dan.j.williams@intel.com>, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig <hch@infradead.org>, Jason Gunthorpe <jgg@ziepe.ca>, xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>, "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com>, John Hubbard <jhubbard@nvidia.com>, intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>, linux-rpi-kernel@lists.infradead.org, ceph-devel@vger.kernel.org, linux-arm-kerne

On Thu, Aug 01, 2019 at 07:19:41PM -0700, john.hubbard@gmail.com wrote:
> From: John Hubbard <jhubbard@nvidia.com>
> 
> For pages that were retained via get_user_pages*(), release those pages
> via the new put_user_page*() routines, instead of via put_page() or
> release_pages().
> 
> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions").
> 
> This changes the release code slightly, because each page slot in the
> page_list[] array is no longer checked for NULL. However, that check
> was wrong anyway, because the get_user_pages() pattern of usage here
> never allowed for NULL entries within a range of pinned pages.
> 
> Cc: Frank Haverkamp <haver@linux.vnet.ibm.com>
> Cc: "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: John Hubbard <jhubbard@nvidia.com>
> ---
>  drivers/misc/genwqe/card_utils.c | 17 +++--------------
>  1 file changed, 3 insertions(+), 14 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>