Hi Yangtao, Thank you for the patch! Yet something to improve: [auto build test ERROR on block/for-next] [also build test ERROR on v4.20-rc4 next-20181130] [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/Yangtao-Li/block-Change-to-use-DEFINE_SHOW_ATTRIBUTE-macro/20181201-211704 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: i386-randconfig-x075-201847 (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//block/pktcdvd.c:2244:12: error: conflicting types for 'pkt_open' static int pkt_open(struct block_device *bdev, fmode_t mode) ^~~~~~~~ In file included from include/linux/cgroup.h:18:0, from include/linux/kthread.h:7, from drivers//block/pktcdvd.c:54: drivers//block/pktcdvd.c:455:23: note: previous definition of 'pkt_open' was here DEFINE_SHOW_ATTRIBUTE(pkt); ^ include/linux/seq_file.h:149:12: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' static int __name ## _open(struct inode *inode, struct file *file) \ ^~~~~~ vim +/pkt_open +2244 drivers//block/pktcdvd.c ^1da177e Linus Torvalds 2005-04-16 2243 5e5e007c Al Viro 2008-03-02 @2244 static int pkt_open(struct block_device *bdev, fmode_t mode) ^1da177e Linus Torvalds 2005-04-16 2245 { ^1da177e Linus Torvalds 2005-04-16 2246 struct pktcdvd_device *pd = NULL; ^1da177e Linus Torvalds 2005-04-16 2247 int ret; ^1da177e Linus Torvalds 2005-04-16 2248 2a48fc0a Arnd Bergmann 2010-06-02 2249 mutex_lock(&pktcdvd_mutex); 1657f824 Jes Sorensen 2006-03-23 2250 mutex_lock(&ctl_mutex); 5e5e007c Al Viro 2008-03-02 2251 pd = pkt_find_dev_from_minor(MINOR(bdev->bd_dev)); ^1da177e Linus Torvalds 2005-04-16 2252 if (!pd) { ^1da177e Linus Torvalds 2005-04-16 2253 ret = -ENODEV; ^1da177e Linus Torvalds 2005-04-16 2254 goto out; ^1da177e Linus Torvalds 2005-04-16 2255 } ^1da177e Linus Torvalds 2005-04-16 2256 BUG_ON(pd->refcnt < 0); ^1da177e Linus Torvalds 2005-04-16 2257 ^1da177e Linus Torvalds 2005-04-16 2258 pd->refcnt++; 46f4e1b7 Peter Osterlund 2005-05-20 2259 if (pd->refcnt > 1) { 5e5e007c Al Viro 2008-03-02 2260 if ((mode & FMODE_WRITE) && 46f4e1b7 Peter Osterlund 2005-05-20 2261 !test_bit(PACKET_WRITABLE, &pd->flags)) { 46f4e1b7 Peter Osterlund 2005-05-20 2262 ret = -EBUSY; 46f4e1b7 Peter Osterlund 2005-05-20 2263 goto out_dec; 46f4e1b7 Peter Osterlund 2005-05-20 2264 } 46f4e1b7 Peter Osterlund 2005-05-20 2265 } else { 5e5e007c Al Viro 2008-03-02 2266 ret = pkt_open_dev(pd, mode & FMODE_WRITE); 01fd9fda Peter Osterlund 2006-02-14 2267 if (ret) ^1da177e Linus Torvalds 2005-04-16 2268 goto out_dec; ^1da177e Linus Torvalds 2005-04-16 2269 /* ^1da177e Linus Torvalds 2005-04-16 2270 * needed here as well, since ext2 (among others) may change ^1da177e Linus Torvalds 2005-04-16 2271 * the blocksize at mount time ^1da177e Linus Torvalds 2005-04-16 2272 */ 5e5e007c Al Viro 2008-03-02 2273 set_blocksize(bdev, CD_FRAMESIZE); ^1da177e Linus Torvalds 2005-04-16 2274 } ^1da177e Linus Torvalds 2005-04-16 2275 1657f824 Jes Sorensen 2006-03-23 2276 mutex_unlock(&ctl_mutex); 2a48fc0a Arnd Bergmann 2010-06-02 2277 mutex_unlock(&pktcdvd_mutex); ^1da177e Linus Torvalds 2005-04-16 2278 return 0; ^1da177e Linus Torvalds 2005-04-16 2279 ^1da177e Linus Torvalds 2005-04-16 2280 out_dec: ^1da177e Linus Torvalds 2005-04-16 2281 pd->refcnt--; ^1da177e Linus Torvalds 2005-04-16 2282 out: 1657f824 Jes Sorensen 2006-03-23 2283 mutex_unlock(&ctl_mutex); 2a48fc0a Arnd Bergmann 2010-06-02 2284 mutex_unlock(&pktcdvd_mutex); ^1da177e Linus Torvalds 2005-04-16 2285 return ret; ^1da177e Linus Torvalds 2005-04-16 2286 } ^1da177e Linus Torvalds 2005-04-16 2287 :::::: The code at line 2244 was first introduced by commit :::::: 5e5e007c25009c304af693b7fc49bab8d1d25801 [PATCH] switch pktdvdcd :::::: TO: Al Viro <viro@xxxxxxxxxxxxxxxxxx> :::::: CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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