[ I suppose this is intentional but this is the first time
NILFS_BTREE_KEY_MAX has been used since it was introduced in 2009 so
it's strange. - dan ]
tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 50d4d7167355e3ffa6e0a759e88cd277e58a5cb9
commit: 6c302a8684cd06a7ec985fb23f31fa8f3f210eef [6096/6547] nilfs2: add bmap function to seek a valid key
fs/nilfs2/btree.c:1611 nilfs_btree_seek_key() warn: impossible condition '(start > (~0)) => (0-u64max > u64max)'
git remote add next git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git remote update next
git checkout 6c302a8684cd06a7ec985fb23f31fa8f3f210eef
vim +1611 fs/nilfs2/btree.c
17c76b01 Koji Sato 2009-04-06 1595 goto out;
2e0c2c73 Ryusuke Konishi 2009-08-15 1596 nilfs_btree_commit_delete(btree, path, level, dat);
be667377 Ryusuke Konishi 2011-03-05 1597 nilfs_inode_sub_blocks(btree->b_inode, stats.bs_nblocks);
17c76b01 Koji Sato 2009-04-06 1598
17c76b01 Koji Sato 2009-04-06 1599 out:
6d28f7ea Ryusuke Konishi 2009-08-15 1600 nilfs_btree_free_path(path);
17c76b01 Koji Sato 2009-04-06 1601 return ret;
17c76b01 Koji Sato 2009-04-06 1602 }
17c76b01 Koji Sato 2009-04-06 1603
6c302a86 Ryusuke Konishi 2015-03-20 1604 static int nilfs_btree_seek_key(const struct nilfs_bmap *btree, __u64 start,
6c302a86 Ryusuke Konishi 2015-03-20 1605 __u64 *keyp)
6c302a86 Ryusuke Konishi 2015-03-20 1606 {
6c302a86 Ryusuke Konishi 2015-03-20 1607 struct nilfs_btree_path *path;
6c302a86 Ryusuke Konishi 2015-03-20 1608 const int minlevel = NILFS_BTREE_LEVEL_NODE_MIN;
6c302a86 Ryusuke Konishi 2015-03-20 1609 int ret;
6c302a86 Ryusuke Konishi 2015-03-20 1610
6c302a86 Ryusuke Konishi 2015-03-20 @1611 if (start > NILFS_BTREE_KEY_MAX)
6c302a86 Ryusuke Konishi 2015-03-20 1612 return -ENOENT;
6c302a86 Ryusuke Konishi 2015-03-20 1613
6c302a86 Ryusuke Konishi 2015-03-20 1614 path = nilfs_btree_alloc_path();
6c302a86 Ryusuke Konishi 2015-03-20 1615 if (!path)
6c302a86 Ryusuke Konishi 2015-03-20 1616 return -ENOMEM;
6c302a86 Ryusuke Konishi 2015-03-20 1617
6c302a86 Ryusuke Konishi 2015-03-20 1618 ret = nilfs_btree_do_lookup(btree, path, start, NULL, minlevel, 0);
6c302a86 Ryusuke Konishi 2015-03-20 1619 if (!ret)
---
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