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

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Message-Id: <7BBD57E4-287B-461B-BC5C-D2FF35865D39@gmail.com>
Date:   Fri, 1 Apr 2022 08:50:10 +0200
From:   Jakob Koschel <jakobkoschel@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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 Mailing List <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 1. Apr 2022, at 07:38, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> 
> 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.

Looks like the driver was removed just a few hours after I rebased.
Feel free to just ignore this patch.

> 
> thanks,
> 
> greg k-h

Thanks,
Jakob