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@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
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