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From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
	Miklos Szeredi <mszeredi@suse.cz>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Dave Chinner <dchinner@redhat.com>
Subject: linux-next: manual merge of the akpm tree with Linus' tree
Date: Mon, 9 Sep 2013 15:38:40 +1000
Message-ID: <20130909153840.1783766acc78ea419e68b071@canb.auug.org.au> (raw)

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Hi Andrew,

Today's linux-next merge of the akpm tree got a conflict in fs/dcache.c
between commit db14fc3abcd5 ("vfs: add d_walk()") from Linus' tree and
commit "dcache: convert to use new lru list infrastructure" from the akpm
tree.

I fixed it up (hopefully - see below) and can carry the fix as necessary
(no action is required).

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

diff --cc fs/dcache.c
index fc05994,e4df9de..0000000
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@@ -1313,46 -1197,94 +1297,47 @@@ out
   * drop the lock and return early due to latency
   * constraints.
   */
 -static int select_parent(struct dentry *parent, struct list_head *dispose)
 -{
 -	struct dentry *this_parent;
 -	struct list_head *next;
 -	unsigned seq;
 -	int found = 0;
 -	int locked = 0;
  
 -	seq = read_seqbegin(&rename_lock);
 -again:
 -	this_parent = parent;
 -	spin_lock(&this_parent->d_lock);
 -repeat:
 -	next = this_parent->d_subdirs.next;
 -resume:
 -	while (next != &this_parent->d_subdirs) {
 -		struct list_head *tmp = next;
 -		struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
 -		next = tmp->next;
 -
 -		spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
 +struct select_data {
 +	struct dentry *start;
 +	struct list_head dispose;
 +	int found;
 +};
  
 -		/*
 -		 * move only zero ref count dentries to the dispose list.
 -		 *
 -		 * Those which are presently on the shrink list, being processed
 -		 * by shrink_dentry_list(), shouldn't be moved.  Otherwise the
 -		 * loop in shrink_dcache_parent() might not make any progress
 -		 * and loop forever.
 -		 */
 -		if (dentry->d_lockref.count) {
 -			dentry_lru_del(dentry);
 -		} else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
 -			dentry_lru_del(dentry);
 -			list_add_tail(&dentry->d_lru, dispose);
 -			dentry->d_flags |= DCACHE_SHRINK_LIST;
 -			found++;
 -		}
 -		/*
 -		 * We can return to the caller if we have found some (this
 -		 * ensures forward progress). We'll be coming back to find
 -		 * the rest.
 -		 */
 -		if (found && need_resched()) {
 -			spin_unlock(&dentry->d_lock);
 -			goto out;
 -		}
 +static enum d_walk_ret select_collect(void *_data, struct dentry *dentry)
 +{
 +	struct select_data *data = _data;
 +	enum d_walk_ret ret = D_WALK_CONTINUE;
  
 -		/*
 -		 * Descend a level if the d_subdirs list is non-empty.
 -		 */
 -		if (!list_empty(&dentry->d_subdirs)) {
 -			spin_unlock(&this_parent->d_lock);
 -			spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
 -			this_parent = dentry;
 -			spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
 -			goto repeat;
 -		}
 +	if (data->start == dentry)
 +		goto out;
  
 -		spin_unlock(&dentry->d_lock);
 -	}
  	/*
 -	 * All done at this level ... ascend and resume the search.
 +	 * move only zero ref count dentries to the dispose list.
 +	 *
 +	 * Those which are presently on the shrink list, being processed
 +	 * by shrink_dentry_list(), shouldn't be moved.  Otherwise the
 +	 * loop in shrink_dcache_parent() might not make any progress
 +	 * and loop forever.
  	 */
 -	if (this_parent != parent) {
 -		struct dentry *child = this_parent;
 -		this_parent = try_to_ascend(this_parent, locked, seq);
 -		if (!this_parent)
 -			goto rename_retry;
 -		next = child->d_u.d_child.next;
 -		goto resume;
 +	if (dentry->d_lockref.count) {
 +		dentry_lru_del(dentry);
 +	} else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
- 		dentry_lru_move_list(dentry, &data->dispose);
++		dentry_lru_del(dentry);
++		list_add_tail(&dentry->d_lru, &data->dispose);
 +		dentry->d_flags |= DCACHE_SHRINK_LIST;
 +		data->found++;
 +		ret = D_WALK_NORETRY;
  	}
 +	/*
 +	 * We can return to the caller if we have found some (this
 +	 * ensures forward progress). We'll be coming back to find
 +	 * the rest.
 +	 */
 +	if (data->found && need_resched())
 +		ret = D_WALK_QUIT;
  out:
 -	spin_unlock(&this_parent->d_lock);
 -	if (!locked && read_seqretry(&rename_lock, seq))
 -		goto rename_retry;
 -	if (locked)
 -		write_sequnlock(&rename_lock);
 -	return found;
 -
 -rename_retry:
 -	if (found)
 -		return found;
 -	if (locked)
 -		goto again;
 -	locked = 1;
 -	write_seqlock(&rename_lock);
 -	goto again;
 +	return ret;
  }
  
  /**

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             reply index

Thread overview: 106+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-09  5:38 Stephen Rothwell [this message]
  -- strict thread matches above, loose matches on Subject: below --
2019-12-02  2:17 Stephen Rothwell
2019-12-02  2:08 Stephen Rothwell
2018-10-15  7:22 Stephen Rothwell
2018-10-15  7:04 Stephen Rothwell
2018-03-26  8:56 Stephen Rothwell
2017-01-09  2:51 Stephen Rothwell
2016-12-12  5:49 Stephen Rothwell
2016-01-19  2:42 Stephen Rothwell
2016-01-19  2:36 Stephen Rothwell
2015-07-27  5:26 Stephen Rothwell
2013-09-10  4:38 Stephen Rothwell
2013-09-10 22:27 ` Andrew Morton
2013-09-10 22:29   ` Al Viro
2013-09-10 22:35     ` Andrew Morton
2013-09-10 22:36       ` Al Viro
2013-09-10 22:39         ` Al Viro
2013-09-10 22:41         ` Andrew Morton
2013-09-10 22:48           ` Al Viro
2013-09-10 22:59             ` Al Viro
2013-09-10 23:13               ` Andrew Morton
2013-09-10 23:55                 ` Al Viro
2013-09-11  4:30                 ` Stephen Rothwell
2013-09-10 23:37               ` Linus Torvalds
2013-09-10 23:53                 ` Al Viro
2013-09-11  0:01                   ` Linus Torvalds
2013-09-11  0:39                     ` Dave Chinner
2013-09-13  0:56                 ` Linus Torvalds
2013-09-13  1:12                   ` Linus Torvalds
2013-09-13  1:35                     ` Al Viro
2013-09-13 19:12                     ` Linus Torvalds
2013-09-13 19:28                       ` Linus Torvalds
2013-09-13 19:54                       ` Linus Torvalds
2013-09-13 20:00                       ` Al Viro
2013-09-13 20:18                         ` Al Viro
2013-09-13 20:23                           ` Al Viro
2013-09-13 20:25                         ` Linus Torvalds
2013-09-13 20:31                           ` Linus Torvalds
2013-09-13 20:31                           ` Al Viro
2013-09-13 20:34                             ` Linus Torvalds
2013-09-10 22:35   ` Linus Torvalds
2013-09-10 22:44     ` Andrew Morton
2013-09-11  0:30       ` Stephen Rothwell
2013-09-11  0:41         ` Linus Torvalds
2013-09-10  4:21 Stephen Rothwell
2013-09-10  4:09 Stephen Rothwell
2013-09-10  4:12 ` Stephen Rothwell
2013-09-09  5:22 Stephen Rothwell
2013-09-09  5:16 Stephen Rothwell
2013-08-30  8:44 Stephen Rothwell
2013-05-27  6:20 Stephen Rothwell
2013-05-20  4:04 Stephen Rothwell
2013-05-20 12:19 ` Chris Mason
2013-05-13  5:20 Eric Paris
2013-05-13  2:07 Stephen Rothwell
2013-05-13  2:11 ` Eric Paris
2013-05-13  4:16   ` Stephen Rothwell
2013-05-13  4:49   ` Kees Cook
2013-05-13  5:14     ` Eric Paris
2013-05-02  6:01 Stephen Rothwell
2013-04-29  8:38 Stephen Rothwell
2013-04-19  7:40 Stephen Rothwell
2013-04-16  7:25 Stephen Rothwell
2013-04-03  6:10 Stephen Rothwell
2013-03-25  4:22 Stephen Rothwell
2013-03-04  2:21 Stephen Rothwell
2013-01-04  3:27 Stephen Rothwell
2012-12-11  5:25 Stephen Rothwell
2012-12-11  5:22 Stephen Rothwell
2012-12-11  7:58 ` Glauber Costa
2012-12-07  6:39 Stephen Rothwell
2012-11-30  6:24 Stephen Rothwell
2012-11-26 12:52 Stephen Rothwell
2012-11-26 12:48 Stephen Rothwell
2012-11-26 13:25 ` Xiaotian Feng
2012-11-26 12:34 Stephen Rothwell
2012-10-15  2:07 Stephen Rothwell
2012-10-15 22:14 ` Catalin Marinas
2012-10-01 14:15 Stephen Rothwell
2012-08-22  5:59 Stephen Rothwell
2012-08-22  8:58 ` Mel Gorman
2012-07-27  3:57 Stephen Rothwell
2012-07-02  6:39 Stephen Rothwell
2012-06-04  4:58 Stephen Rothwell
2012-05-31  4:24 Stephen Rothwell
2012-05-31  4:13 Stephen Rothwell
2012-05-31  7:25 ` Johannes Weiner
2012-05-31  8:24   ` Stephen Rothwell
2012-05-31  8:27     ` Stephen Rothwell
2012-05-21  8:23 Stephen Rothwell
2012-05-21  8:13 Stephen Rothwell
2012-05-21  8:16 ` Cyrill Gorcunov
2012-03-08  6:53 Stephen Rothwell
2012-03-08  7:32 ` Andrew Morton
2012-03-08  7:41   ` Stephen Rothwell
2012-03-08  7:50     ` Andrew Morton
2012-03-08  7:50       ` Xiao Guangrong
2012-03-08  9:59       ` Xiao Guangrong
2012-03-08 21:24         ` Andrew Morton
2012-03-08 23:42           ` Linus Torvalds
2011-12-28  7:54 Stephen Rothwell
2011-11-08  3:24 Stephen Rothwell
2011-11-01  8:16 Stephen Rothwell
2011-11-01 10:47 ` Tao Ma
2011-09-16  6:09 Stephen Rothwell
2011-08-15  4:52 Stephen Rothwell

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