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SubjectRe: [PATCH 2/2] scsi: Align queue to ARCH_DMA_MINALIGN in non-coherent DMA mode
Hi Huacai,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.13 next-20170908]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Huacai-Chen/mm-dmapool-Align-to-ARCH_DMA_MINALIGN-in-non-coherent-DMA-mode/20170909-230504
base: git://git.cmpxchg.org/linux-mmotm.git master
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=m68k

All errors (new ones prefixed by >>):

drivers/scsi/scsi_lib.c: In function '__scsi_init_queue':
drivers/scsi/scsi_lib.c:2139:2: error: implicit declaration of function 'plat_device_is_coherent' [-Werror=implicit-function-declaration]
if (plat_device_is_coherent(dev))
^
>> drivers/scsi/scsi_lib.c:2142:3: error: implicit declaration of function 'dma_get_cache_alignment' [-Werror=implicit-function-declaration]
blk_queue_dma_alignment(q, dma_get_cache_alignment() - 1);
^
cc1: some warnings being treated as errors

vim +/dma_get_cache_alignment +2142 drivers/scsi/scsi_lib.c

2103
2104 void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
2105 {
2106 struct device *dev = shost->dma_dev;
2107
2108 queue_flag_set_unlocked(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
2109
2110 /*
2111 * this limit is imposed by hardware restrictions
2112 */
2113 blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,
2114 SG_MAX_SEGMENTS));
2115
2116 if (scsi_host_prot_dma(shost)) {
2117 shost->sg_prot_tablesize =
2118 min_not_zero(shost->sg_prot_tablesize,
2119 (unsigned short)SCSI_MAX_PROT_SG_SEGMENTS);
2120 BUG_ON(shost->sg_prot_tablesize < shost->sg_tablesize);
2121 blk_queue_max_integrity_segments(q, shost->sg_prot_tablesize);
2122 }
2123
2124 blk_queue_max_hw_sectors(q, shost->max_sectors);
2125 blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));
2126 blk_queue_segment_boundary(q, shost->dma_boundary);
2127 dma_set_seg_boundary(dev, shost->dma_boundary);
2128
2129 blk_queue_max_segment_size(q, dma_get_max_seg_size(dev));
2130
2131 if (!shost->use_clustering)
2132 q->limits.cluster = 0;
2133
2134 /*
2135 * set a reasonable default alignment on word/cacheline boundaries:
2136 * the host and device may alter it using
2137 * blk_queue_update_dma_alignment() later.
2138 */
> 2139 if (plat_device_is_coherent(dev))
2140 blk_queue_dma_alignment(q, 0x04 - 1);
2141 else
> 2142 blk_queue_dma_alignment(q, dma_get_cache_alignment() - 1);
2143 }
2144 EXPORT_SYMBOL_GPL(__scsi_init_queue);
2145

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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