linux-kernel - Re: [PATCH 09/21] binder: split up binder_update_page

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Message-ID: <ZWmFM8R2di2252k8@google.com>
Date:   Fri, 1 Dec 2023 07:03:15 +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 09/21] binder: split up binder_update_page_range()

On Tue, Nov 07, 2023 at 09:08:15AM +0000, Alice Ryhl wrote:
> Carlos Llamas <cmllamas@...gle.com> writes:
> > The binder_update_page_range() function performs both allocation and
> > freeing of binder pages. However, these two operations are unrelated and
> > have no common logic. In fact, when a free operation is requested, the
> > allocation logic is skipped entirely. This behavior makes the error path
> > unnecessarily complex. To improve readability of the code, this patch
> > splits the allocation and freeing operations into separate functions.
> > 
> > No functional changes are introduced by this patch.
> > 
> > Signed-off-by: Carlos Llamas <cmllamas@...gle.com>
> 
> The part below err_vm_insert_page_failed was a bit tricky, but I agree
> that this is correct.

Yes, this was a big reason behind this patch.

--
Carlos Llamas