linux-kernel - Re: [PATCH] staging: android: ashmem: remove usage of list iterator after the loop body

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Message-ID: <YkaP6UWmSZjxO/oA@kroah.com>
Date:   Fri, 1 Apr 2022 07:38:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jakob Koschel <jakobkoschel@...il.com>
Cc:     Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Mike Rapoport <rppt@...nel.org>,
        Brian Johannesmeyer <bjohannesmeyer@...il.com>,
        Cristiano Giuffrida <c.giuffrida@...nl>,
        "Bos, H.J." <h.j.bos@...nl>
Subject: Re: [PATCH] staging: android: ashmem: remove usage of list iterator
 after the loop body

On Thu, Mar 31, 2022 at 11:39:34PM +0200, Jakob Koschel wrote:
> In preparation to limit the scope of a list iterator to the list
> traversal loop, use a dedicated pointer to point to the found element
> [1].
> 
> Before, the code implicitly used the head when no element was found
> when using &pos->list. Since the new variable is only set if an
> element was found, the head needs to be used explicitly if the
> variable is NULL.
> 
> Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
> Signed-off-by: Jakob Koschel <jakobkoschel@...il.com>
> ---
>  drivers/staging/android/ashmem.c | 21 ++++++++++++---------
>  1 file changed, 12 insertions(+), 9 deletions(-)

What tree did you make this against?  This file is no longer in Linus's
tree.

thanks,

greg k-h