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| author | Jonathan Cameron <jic23@kernel.org> | 2015-01-31 12:41:14 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-01-31 12:41:14 +0300 |
| commit | 67460e8c9a5c59f66e1d476fd9341086cd792e5a (patch) | |
| tree | 9e83681f81674d3b0f967dad45399db84d664172 /drivers/iio | |
| parent | 40cb761306d6c19d80fe85f9ae52615932f76b71 (diff) | |
| download | linux-67460e8c9a5c59f66e1d476fd9341086cd792e5a.tar.xz | |
iio:common:ssp_sensors fix warnings due to 32 bit instead of 64 bit passed to do_div
Also change to div64_u64 in one place to avoid loss of precision
(was dividing a 32 bit number by a 64 bit number, but casting this
to 64 bit divided by 32 bit) Those divide functions certainly have
esoteric naming!
Fixes warnings with asm-generic/div64.h do_div such as:
In file included from drivers/iio/common/ssp_sensors/ssp_iio.c:20:0:
drivers/iio/common/ssp_sensors/ssp_iio_sensor.h: In function 'ssp_convert_to_freq':
>> drivers/iio/common/ssp_sensors/ssp_iio_sensor.h:56:16: warning: comparison of distinct pointer types lacks a cast [enabled by default]
drivers/iio/common/ssp_sensors/ssp_iio_sensor.h:56:2: warning: right shift count >= width of type [enabled by default]
>> drivers/iio/common/ssp_sensors/ssp_iio_sensor.h:56:2: warning: passing argument 1 of '__div64_32' from incompatible pointer type [enabled by default]
include/asm-generic/div64.h:35:17: note: expected 'uint64_t *' but argument is of type 'int *'
drivers/iio/common/ssp_sensors/ssp_iio.c: In function 'ssp_common_process_data':
include/linux/iio/buffer.h:142:32: warning: 'calculated_time' may be used uninitialized in this function [-Wuninitialized]
drivers/iio/common/ssp_sensors/ssp_iio.c:83:10: note: 'calculated_time' was declared here
Fixed by using straight coded version as per the description in the
div64.h header, thus ensuring no issue with 32 bit integers.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/common/ssp_sensors/ssp_iio_sensor.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h b/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h index dda267c9bd2a..541c6590d69c 100644 --- a/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h +++ b/drivers/iio/common/ssp_sensors/ssp_iio_sensor.h @@ -30,7 +30,7 @@ } #define SSP_MS_PER_S 1000 -#define SSP_INVERTED_SCALING_FACTOR 1000000ULL +#define SSP_INVERTED_SCALING_FACTOR 1000000U #define SSP_FACTOR_WITH_MS \ (SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S) @@ -53,7 +53,8 @@ static inline void ssp_convert_to_freq(u32 time, int *integer_part, } *integer_part = SSP_FACTOR_WITH_MS / time; - *fractional = do_div(*integer_part, SSP_INVERTED_SCALING_FACTOR); + *fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR; + *integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR; } /* Converts frequency to time in ms */ @@ -61,10 +62,10 @@ static inline int ssp_convert_to_time(int integer_part, int fractional) { u64 value; - value = integer_part * SSP_INVERTED_SCALING_FACTOR + fractional; + value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional; if (value == 0) return 0; - return div_u64(SSP_FACTOR_WITH_MS, value); + return div64_u64((u64)SSP_FACTOR_WITH_MS, value); } #endif /* __SSP_IIO_SENSOR_H__ */ |