linux-kernel - Re: [PATCH 2/2] IB/uverbs: clean up INIT

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Date:   Mon, 11 Sep 2017 17:27:00 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Doug Ledford <dledford@...hat.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Matan Barak <matanb@...lanox.com>,
        Yishai Hadas <yishaih@...lanox.com>,
        Moses Reuben <mosesr@...lanox.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] IB/uverbs: clean up INIT_UDATA() macro usage

On Wed, Sep 06, 2017 at 11:34:26PM +0200, Arnd Bergmann wrote:
> After changing INIT_UDATA_BUF_OR_NULL() to an inline function,
> this does the same change to INIT_UDATA for consistency.
> I'm keeping it separate as this part is much larger and
> we wouldn't want to backport this to stable kernels if we
> ever want to address the gcc warnings by backporting the
> first patch.
>
> Again, using an inline function gives us better type
> safety here among other issues with macros. I'm using
> u64_to_user_ptr() to convert the user pointer to simplify
> the logic rather than adding lots of new type casts.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/infiniband/core/uverbs.h     |  22 +++---
>  drivers/infiniband/core/uverbs_cmd.c | 125 +++++++++++++++--------------------
>  2 files changed, 67 insertions(+), 80 deletions(-)
>

Thanks, for doing it and for spotting light on u64_to_user_ptr().

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