linux-kernel - Re: [PATCH v3 1/6] binder: Fix selftest page indexing

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Message-ID: <CAFuZdD+ZCo6s5Yo=OeUt22F9kymERk+a5w1xH32Nyae_29q6PQ@mail.gmail.com>
Date: Mon, 14 Jul 2025 21:52:02 -0700
From: Carlos Llamas <cmllamas@...gle.com>
To: Tiffany Yang <ynaffit@...gle.com>
Cc: linux-kernel@...r.kernel.org, keescook@...gle.com, kernel-team@...roid.com, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Arve Hjønnevåg <arve@...roid.com>, 
	Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>, 
	Joel Fernandes <joelagnelf@...dia.com>, Christian Brauner <brauner@...nel.org>, 
	Suren Baghdasaryan <surenb@...gle.com>, Brendan Higgins <brendan.higgins@...ux.dev>, 
	David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>, linux-kselftest@...r.kernel.org, 
	kunit-dev@...glegroups.com
Subject: Re: [PATCH v3 1/6] binder: Fix selftest page indexing

On Mon, Jul 14, 2025 at 11:53:14AM -0700, Tiffany Yang wrote:
> The binder allocator selftest was only checking the last page of buffers
> that ended on a page boundary. Correct the page indexing to account for
> buffers that are not page-aligned.
>
> Signed-off-by: Tiffany Yang <ynaffit@...gle.com>
> ---
>  drivers/android/binder_alloc_selftest.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/android/binder_alloc_selftest.c b/drivers/android/binder_alloc_selftest.c
> index c88735c54848..486af3ec3c02 100644
> --- a/drivers/android/binder_alloc_selftest.c
> +++ b/drivers/android/binder_alloc_selftest.c
> @@ -142,12 +142,12 @@ static void binder_selftest_free_buf(struct binder_alloc *alloc,
>       for (i = 0; i < BUFFER_NUM; i++)
>               binder_alloc_free_buf(alloc, buffers[seq[i]]);
>
> -     for (i = 0; i < end / PAGE_SIZE; i++) {
>               /**
>                * Error message on a free page can be false positive
>                * if binder shrinker ran during binder_alloc_free_buf
>                * calls above.
>                */
> +     for (i = 0; i <= (end - 1) / PAGE_SIZE; i++) {
>               if (list_empty(page_to_lru(alloc->pages[i]))) {
>                       pr_err_size_seq(sizes, seq);
>                       pr_err("expect lru but is %s at page index %d\n",
> --
> 2.50.0.727.gbf7dc18ff4-goog
>

LGTM!

Acked-by: Carlos Llamas <cmllamas@...gle.com>