Re: [PATCH] mux: mmio: drop obsolete dependency on COMPILE_TEST

From: Peter Rosin
Date: Sat Nov 26 2022 - 16:45:23 EST


Hi!

2022-11-24 at 13:37, Jean Delvare wrote:
> Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it
> is possible to test-build any driver which depends on OF on any
> architecture by explicitly selecting OF. Therefore depending on
> COMPILE_TEST as an alternative is no longer needed.
>
> It is actually better to always build such drivers with OF enabled,
> so that the test builds are closer to how each driver will actually be
> built on its intended target. Building them without OF may not test
> much as the compiler will optimize out potentially large parts of the
> code. In the worst case, this could even pop false positive warnings.
> Dropping COMPILE_TEST here improves the quality of our testing and
> avoids wasting time on non-existent issues.
>
> As a minor optimization, this also lets us drop of_match_ptr(), as we
> now know what it will resolve to, we might as well save cpp some work.
>
> Signed-off-by: Jean Delvare <jdelvare@xxxxxxx>
> Cc: Peter Rosin <peda@xxxxxxxxxx>

Yes, entirely reasonable. I have pushed this out to the mux for-next
branch. That said, it's probably a bit late for the upcoming merge
window...

Cheers,
Peter

> ---
> drivers/mux/Kconfig | 2 +-
> drivers/mux/mmio.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> --- linux-6.0.orig/drivers/mux/Kconfig
> +++ linux-6.0/drivers/mux/Kconfig
> @@ -47,7 +47,7 @@ config MUX_GPIO
>
> config MUX_MMIO
> tristate "MMIO/Regmap register bitfield-controlled Multiplexer"
> - depends on OF || COMPILE_TEST
> + depends on OF
> help
> MMIO/Regmap register bitfield-controlled Multiplexer controller.
>
> --- linux-6.0.orig/drivers/mux/mmio.c
> +++ linux-6.0/drivers/mux/mmio.c
> @@ -131,7 +131,7 @@ static int mux_mmio_probe(struct platfor
> static struct platform_driver mux_mmio_driver = {
> .driver = {
> .name = "mmio-mux",
> - .of_match_table = of_match_ptr(mux_mmio_dt_ids),
> + .of_match_table = mux_mmio_dt_ids,
> },
> .probe = mux_mmio_probe,
> };
>
>