linux-kernel - Re: [PATCH 16/21] binder: refactor page range allocation

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Message-ID: <ZWmI6QxlDuV-Miyr@google.com>
Date:   Fri, 1 Dec 2023 07:19:05 +0000
From:   Carlos Llamas <cmllamas@...gle.com>
To:     Alice Ryhl <aliceryhl@...gle.com>
Cc:     Arve Hjønnevåg <arve@...roid.com>,
        Christian Brauner <brauner@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org,
        Martijn Coenen <maco@...roid.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Todd Kjos <tkjos@...roid.com>
Subject: Re: [PATCH 16/21] binder: refactor page range allocation

On Tue, Nov 07, 2023 at 09:08:35AM +0000, Alice Ryhl wrote:
> Carlos Llamas <cmllamas@...gle.com> writes:
> > Instead of looping through the page range twice to first determine if
> > the mmap lock is required, simply do it per-page as needed. Split out
> > all this logic into a separate binder_get_user_page_remote() function.
> >
> > Signed-off-by: Carlos Llamas <cmllamas@...gle.com>
> 
> One nit, otherwise looks okay to me.
> Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
> 
> Carlos Llamas <cmllamas@...gle.com> writes:
> > +		unsigned long index;
> > -		size_t index;
> 
> You're changing the type of index to unsigned long here, but it seems to
> me that size_t is the correct type.

Perhaps size_t made sense before the addresses were also moved to
unsigned long. I think this is a better fit now.

--
Carlos Llamas