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| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-07 18:54:21 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-11 19:43:24 +0300 |
| commit | eefffb42f6659c9510105f3e4ebf2a8499d56936 (patch) | |
| tree | 0498804ba6a9fe694b3a8e85874817cd49c791a8 /include/linux/spi | |
| parent | 14dbfb417bd80c96ec700c7a8414bb6f5db7ecd2 (diff) | |
| download | linux-eefffb42f6659c9510105f3e4ebf2a8499d56936.tar.xz | |
spi: work around clang bug in SPI_BPW_RANGE_MASK()
Clang-8 evaluates both sides of a ?: expression to check for
valid arithmetic even in the side that is never taken. This
results in a build warning:
drivers/spi/spi-sh-msiof.c:1052:24: error: shift count >= width of type [-Werror,-Wshift-count-overflow]
.bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32),
^~~~~~~~~~~~~~~~~~~~~~~~~
Change the implementation to use the GENMASK() macro that does
what we want here but does not have a problem with the shift
count overflow.
Link: https://bugs.llvm.org/show_bug.cgi?id=38789
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/spi')
| -rw-r--r-- | include/linux/spi/spi.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 662b336aa2e4..b27386450089 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -444,8 +444,7 @@ struct spi_controller { /* bitmask of supported bits_per_word for transfers */ u32 bits_per_word_mask; #define SPI_BPW_MASK(bits) BIT((bits) - 1) -#define SPI_BIT_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1)) -#define SPI_BPW_RANGE_MASK(min, max) (SPI_BIT_MASK(max) - SPI_BIT_MASK(min - 1)) +#define SPI_BPW_RANGE_MASK(min, max) GENMASK((min) - 1, (max) - 1) /* limits on transfer speed */ u32 min_speed_hz; |