linux-kernel - Re: [PATCH] [RFC] Revert "iio: hid-sensor-attributes: Convert to use int

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Message-ID: <20190906165527.GW2680@smile.fi.intel.com>
Date:   Fri, 6 Sep 2019 19:55:27 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Alexios Zavras <alexios.zavras@...el.com>,
        Colin Ian King <colin.king@...onical.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [RFC] Revert "iio: hid-sensor-attributes: Convert to use
 int_pow()"

On Fri, Sep 06, 2019 at 05:45:55PM +0200, Arnd Bergmann wrote:
> The change to use the generic int_pow instead of the private version
> caused a number of build issues on 32-bit architectures and makes
> it generally less efficient because of the 64-bit math:
> 
> drivers/iio/common/hid-sensors/hid-sensor-attributes.o: In function `hid_sensor_write_samp_freq_value':
> hid-sensor-attributes.c:(.text+0x29c): undefined reference to `__aeabi_uldivmod'
> drivers/iio/common/hid-sensors/hid-sensor-attributes.o: In function `hid_sensor_read_raw_hyst_value':
> hid-sensor-attributes.c:(.text+0x420): undefined reference to `__aeabi_uldivmod'
> hid-sensor-attributes.c:(.text+0x448): undefined reference to `__aeabi_uldivmod'
> drivers/iio/common/hid-sensors/hid-sensor-attributes.o: In function `hid_sensor_write_raw_hyst_value':
> hid-sensor-attributes.c:(.text+0x570): undefined reference to `__aeabi_uldivmod'
> 
> There is probably a nicer solution to this, but for the moment,
> the revert makes it compile again.
> 
> Fixes: 473d12f7638c ("iio: hid-sensor-attributes: Convert to use int_pow()")

Does the fix [1] works for you?

[1]: https://lore.kernel.org/linux-iio/6851830d050ddb2f27d1e6969755ee4f3293d37c.camel@intel.com/

-- 
With Best Regards,
Andy Shevchenko