drivers/spi/spi-loongson-core.c:46:15: sparse: sparse: too long token expansion

[kernel test robot <lkp@intel.com>]

:::::: 
:::::: Manual check reason: "low confidence static check first_new_problem: drivers/spi/spi-loongson-core.c:46:15: sparse: sparse: too long token expansion"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: David Laight <David.Laight@ACULAB.COM>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   13d88ac54ddd1011b6e94443958e798aa06eb835
commit: d03eba99f5bf7cbc6e2fdde3b6fa36954ad58e09 minmax: allow min()/max()/clamp() if the arguments have the same signedness.
date:   3 weeks ago
:::::: branch date: 66 minutes ago
:::::: commit date: 3 weeks ago
config: mips-randconfig-r131-20231107 (https://download.01.org/0day-ci/archive/20231108/202311080515.AMpF3Xli-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231108/202311080515.AMpF3Xli-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202311080515.AMpF3Xli-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/spi/spi-loongson-core.c:46:15: sparse: sparse: too long token expansion
>> drivers/spi/spi-loongson-core.c:46:15: sparse: sparse: too long token expansion
>> drivers/spi/spi-loongson-core.c:46:15: sparse: sparse: too long token expansion

vim +46 drivers/spi/spi-loongson-core.c

6c7a864007b66e Yinbo Zhu 2023-06-13  39  
6c7a864007b66e Yinbo Zhu 2023-06-13  40  static void loongson_spi_set_clk(struct loongson_spi *loongson_spi, unsigned int hz)
6c7a864007b66e Yinbo Zhu 2023-06-13  41  {
6c7a864007b66e Yinbo Zhu 2023-06-13  42  	unsigned char val;
6c7a864007b66e Yinbo Zhu 2023-06-13  43  	unsigned int div, div_tmp;
6c7a864007b66e Yinbo Zhu 2023-06-13  44  	static const char rdiv[12] = {0, 1, 4, 2, 3, 5, 6, 7, 8, 9, 10, 11};
6c7a864007b66e Yinbo Zhu 2023-06-13  45  
6c7a864007b66e Yinbo Zhu 2023-06-13 @46  	div = clamp_val(DIV_ROUND_UP_ULL(loongson_spi->clk_rate, hz), 2, 4096);
6c7a864007b66e Yinbo Zhu 2023-06-13  47  	div_tmp = rdiv[fls(div - 1)];
6c7a864007b66e Yinbo Zhu 2023-06-13  48  	loongson_spi->spcr = (div_tmp & GENMASK(1, 0)) >> 0;
6c7a864007b66e Yinbo Zhu 2023-06-13  49  	loongson_spi->sper = (div_tmp & GENMASK(3, 2)) >> 2;
6c7a864007b66e Yinbo Zhu 2023-06-13  50  	val = loongson_spi_read_reg(loongson_spi, LOONGSON_SPI_SPCR_REG);
6c7a864007b66e Yinbo Zhu 2023-06-13  51  	val &= ~GENMASK(1, 0);
6c7a864007b66e Yinbo Zhu 2023-06-13  52  	loongson_spi_write_reg(loongson_spi, LOONGSON_SPI_SPCR_REG, val |
6c7a864007b66e Yinbo Zhu 2023-06-13  53  			       loongson_spi->spcr);
6c7a864007b66e Yinbo Zhu 2023-06-13  54  	val = loongson_spi_read_reg(loongson_spi, LOONGSON_SPI_SPER_REG);
6c7a864007b66e Yinbo Zhu 2023-06-13  55  	val &= ~GENMASK(1, 0);
6c7a864007b66e Yinbo Zhu 2023-06-13  56  	loongson_spi_write_reg(loongson_spi, LOONGSON_SPI_SPER_REG, val |
6c7a864007b66e Yinbo Zhu 2023-06-13  57  			       loongson_spi->sper);
6c7a864007b66e Yinbo Zhu 2023-06-13  58  	loongson_spi->hz = hz;
6c7a864007b66e Yinbo Zhu 2023-06-13  59  }
6c7a864007b66e Yinbo Zhu 2023-06-13  60  

:::::: The code at line 46 was first introduced by commit
:::::: 6c7a864007b66e60a3f64858a9555efed408b048 spi: loongson: add bus driver for the loongson spi controller

:::::: TO: Yinbo Zhu <zhuyinbo@loongson.cn>
:::::: CC: Mark Brown <broonie@kernel.org>

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