linux-kernel - Re: [PATCH] i2c: Use IS_REACHABLE() for substituting empty ACPI functions

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Message-ID: <ZrzuT3ShO2xeJ4bI@shikoro>
Date: Wed, 14 Aug 2024 19:50:07 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc: tiwai@...e.com, linux-sound@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com,
	kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] i2c: Use IS_REACHABLE() for substituting empty ACPI
 functions

On Wed, Aug 14, 2024 at 01:16:49PM +0100, Richard Fitzgerald wrote:
> Replace IS_ENABLED() with IS_REACHABLE() to substitute empty stubs for:
>     i2c_acpi_get_i2c_resource()
>     i2c_acpi_client_count()
>     i2c_acpi_find_bus_speed()
>     i2c_acpi_new_device_by_fwnode()
>     i2c_adapter *i2c_acpi_find_adapter_by_handle()
>     i2c_acpi_waive_d0_probe()
> 
> commit f17c06c6608a ("i2c: Fix conditional for substituting empty ACPI
> functions") partially fixed this conditional to depend on CONFIG_I2C,
> but used IS_ENABLED(), which is wrong since CONFIG_I2C is tristate.
> 
> CONFIG_ACPI is boolean but let's also change it to use IS_REACHABLE()
> to future-proof it against becoming tristate.
> 
> Somehow despite testing various combinations of CONFIG_I2C and CONFIG_ACPI
> we missed the combination CONFIG_I2C=m, CONFIG_ACPI=y.
> 
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> Fixes: f17c06c6608a ("i2c: Fix conditional for substituting empty ACPI functions")
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202408141333.gYnaitcV-lkp@intel.com/

Applied to for-current, thanks!


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