Hi Darrick, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.16-rc3 next-20180228] [cannot apply to dgc-xfs/for-next] [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/Dave-Jiang/minimal-DAX-support-for-XFS-realtime-device/20180218-154220 config: i386-randconfig-c0-03010621 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): >> drivers/dax/super.c:86:5: error: redefinition of 'bdev_dax_supported' int bdev_dax_supported(struct super_block *sb, struct block_device *bdev, ^~~~~~~~~~~~~~~~~~ In file included from drivers/dax/super.c:23:0: include/linux/dax.h:62:19: note: previous definition of 'bdev_dax_supported' was here static inline int bdev_dax_supported(struct super_block *sb, ^~~~~~~~~~~~~~~~~~ vim +/bdev_dax_supported +86 drivers/dax/super.c 74 75 /** 76 * bdev_dax_supported() - Check if the device supports dax for filesystem 77 * @sb: The superblock of the device 78 * @bdev: block device to check 79 * @blocksize: The block size of the device 80 * 81 * This is a library function for filesystems to check if the block device 82 * can be mounted with dax option. 83 * 84 * Return: negative errno if unsupported, 0 if supported. 85 */ > 86 int bdev_dax_supported(struct super_block *sb, struct block_device *bdev, 87 int blocksize) 88 { 89 struct dax_device *dax_dev; 90 pgoff_t pgoff; 91 int err, id; 92 void *kaddr; 93 pfn_t pfn; 94 long len; 95 96 if (blocksize != PAGE_SIZE) { 97 pr_debug("VFS (%s): error: unsupported blocksize for dax\n", 98 sb->s_id); 99 return -EINVAL; 100 } 101 102 err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff); 103 if (err) { 104 pr_debug("VFS (%s): error: unaligned partition for dax\n", 105 sb->s_id); 106 return err; 107 } 108 109 dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); 110 if (!dax_dev) { 111 pr_debug("VFS (%s): error: device does not support dax\n", 112 sb->s_id); 113 return -EOPNOTSUPP; 114 } 115 116 id = dax_read_lock(); 117 len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); 118 dax_read_unlock(id); 119 120 put_dax(dax_dev); 121 122 if (len < 1) { 123 pr_debug("VFS (%s): error: dax access failed (%ld)\n", 124 sb->s_id, len); 125 return len < 0 ? len : -EIO; 126 } 127 128 if ((IS_ENABLED(CONFIG_FS_DAX_LIMITED) && pfn_t_special(pfn)) 129 || pfn_t_devmap(pfn)) 130 /* pass */; 131 else { 132 pr_debug("VFS (%s): error: dax support not enabled\n", 133 sb->s_id); 134 return -EOPNOTSUPP; 135 } 136 137 return 0; 138 } 139 EXPORT_SYMBOL_GPL(bdev_dax_supported); 140 #endif 141 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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