Merge tag 'v3.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux

Having missed the merge window, update to 3.6-rc2 to avoid conflicts with
new patches.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

12 files changed, 67 insertions, 57 deletions

diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index e5ba34818332..8db4b58b2e4b 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -49,14 +49,13 @@ void ocfs2_dentry_attach_gen(struct dentry *dentry)
 }
 
 
-static int ocfs2_dentry_revalidate(struct dentry *dentry,
-				   struct nameidata *nd)
+static int ocfs2_dentry_revalidate(struct dentry *dentry, unsigned int flags)
 {
 	struct inode *inode;
 	int ret = 0;    /* if all else fails, just return false */
 	struct ocfs2_super *osb;
 
-	if (nd && nd->flags & LOOKUP_RCU)
+	if (flags & LOOKUP_RCU)
 		return -ECHILD;
 
 	inode = dentry->d_inode;
@@ -170,13 +169,11 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
 				      u64 parent_blkno,
 				      int skip_unhashed)
 {
-	struct list_head *p;
-	struct dentry *dentry = NULL;
+	struct hlist_node *p;
+	struct dentry *dentry;
 
 	spin_lock(&inode->i_lock);
-	list_for_each(p, &inode->i_dentry) {
-		dentry = list_entry(p, struct dentry, d_alias);
-
+	hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
 		spin_lock(&dentry->d_lock);
 		if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
 			trace_ocfs2_find_local_alias(dentry->d_name.len,
@@ -184,16 +181,13 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
 
 			dget_dlock(dentry);
 			spin_unlock(&dentry->d_lock);
-			break;
+			spin_unlock(&inode->i_lock);
+			return dentry;
 		}
 		spin_unlock(&dentry->d_lock);
-
-		dentry = NULL;
 	}
-
 	spin_unlock(&inode->i_lock);
-
-	return dentry;
+	return NULL;
 }
 
 DEFINE_SPINLOCK(dentry_attach_lock);
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index e31d6ae013ab..83b6f98e0665 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -526,7 +526,7 @@ bail:
 static int dlmfs_create(struct inode *dir,
 			struct dentry *dentry,
 			umode_t mode,
-			struct nameidata *nd)
+			bool excl)
 {
 	int status = 0;
 	struct inode *inode;
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 81a4cd22f80b..4f7795fb5fc0 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -456,7 +456,7 @@ static void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level,
 	stats->ls_gets++;
 	stats->ls_total += ktime_to_ns(kt);
 	/* overflow */
-	if (unlikely(stats->ls_gets) == 0) {
+	if (unlikely(stats->ls_gets == 0)) {
 		stats->ls_gets++;
 		stats->ls_total = ktime_to_ns(kt);
 	}
@@ -3932,6 +3932,8 @@ unqueue:
 static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb,
 					struct ocfs2_lock_res *lockres)
 {
+	unsigned long flags;
+
 	assert_spin_locked(&lockres->l_lock);
 
 	if (lockres->l_flags & OCFS2_LOCK_FREEING) {
@@ -3945,21 +3947,22 @@ static void ocfs2_schedule_blocked_lock(struct ocfs2_super *osb,
 
 	lockres_or_flags(lockres, OCFS2_LOCK_QUEUED);
 
-	spin_lock(&osb->dc_task_lock);
+	spin_lock_irqsave(&osb->dc_task_lock, flags);
 	if (list_empty(&lockres->l_blocked_list)) {
 		list_add_tail(&lockres->l_blocked_list,
 			      &osb->blocked_lock_list);
 		osb->blocked_lock_count++;
 	}
-	spin_unlock(&osb->dc_task_lock);
+	spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 }
 
 static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb)
 {
 	unsigned long processed;
+	unsigned long flags;
 	struct ocfs2_lock_res *lockres;
 
-	spin_lock(&osb->dc_task_lock);
+	spin_lock_irqsave(&osb->dc_task_lock, flags);
 	/* grab this early so we know to try again if a state change and
 	 * wake happens part-way through our work  */
 	osb->dc_work_sequence = osb->dc_wake_sequence;
@@ -3972,38 +3975,40 @@ static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb)
 				     struct ocfs2_lock_res, l_blocked_list);
 		list_del_init(&lockres->l_blocked_list);
 		osb->blocked_lock_count--;
-		spin_unlock(&osb->dc_task_lock);
+		spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 
 		BUG_ON(!processed);
 		processed--;
 
 		ocfs2_process_blocked_lock(osb, lockres);
 
-		spin_lock(&osb->dc_task_lock);
+		spin_lock_irqsave(&osb->dc_task_lock, flags);
 	}
-	spin_unlock(&osb->dc_task_lock);
+	spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 }
 
 static int ocfs2_downconvert_thread_lists_empty(struct ocfs2_super *osb)
 {
 	int empty = 0;
+	unsigned long flags;
 
-	spin_lock(&osb->dc_task_lock);
+	spin_lock_irqsave(&osb->dc_task_lock, flags);
 	if (list_empty(&osb->blocked_lock_list))
 		empty = 1;
 
-	spin_unlock(&osb->dc_task_lock);
+	spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 	return empty;
 }
 
 static int ocfs2_downconvert_thread_should_wake(struct ocfs2_super *osb)
 {
 	int should_wake = 0;
+	unsigned long flags;
 
-	spin_lock(&osb->dc_task_lock);
+	spin_lock_irqsave(&osb->dc_task_lock, flags);
 	if (osb->dc_work_sequence != osb->dc_wake_sequence)
 		should_wake = 1;
-	spin_unlock(&osb->dc_task_lock);
+	spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 
 	return should_wake;
 }
@@ -4033,10 +4038,12 @@ static int ocfs2_downconvert_thread(void *arg)
 
 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb)
 {
-	spin_lock(&osb->dc_task_lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&osb->dc_task_lock, flags);
 	/* make sure the voting thread gets a swipe at whatever changes
 	 * the caller may have made to the voting state */
 	osb->dc_wake_sequence++;
-	spin_unlock(&osb->dc_task_lock);
+	spin_unlock_irqrestore(&osb->dc_task_lock, flags);
 	wake_up(&osb->dc_event);
 }
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 2f5b92ef0e53..70b5863a2d64 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -923,8 +923,6 @@ out_unlock:
 
 	ocfs2_inode_unlock(inode, 0);
 out:
-	if (ret && ret != -ENXIO)
-		ret = -ENXIO;
 	return ret;
 }
 
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 061591a3ab08..46a1f6d75104 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1950,7 +1950,7 @@ static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
 	if (ret < 0)
 		mlog_errno(ret);
 
-	if (file->f_flags & O_SYNC)
+	if (file && (file->f_flags & O_SYNC))
 		handle->h_sync = 1;
 
 	ocfs2_commit_trans(osb, handle);
@@ -1971,6 +1971,7 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd,
 {
 	struct inode *inode = file->f_path.dentry->d_inode;
 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+	int ret;
 
 	if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
 	    !ocfs2_writes_unwritten_extents(osb))
@@ -1985,7 +1986,12 @@ int ocfs2_change_file_space(struct file *file, unsigned int cmd,
 	if (!(file->f_mode & FMODE_WRITE))
 		return -EBADF;
 
-	return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
+	ret = mnt_want_write_file(file);
+	if (ret)
+		return ret;
+	ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
+	mnt_drop_write_file(file);
+	return ret;
 }
 
 static long ocfs2_fallocate(struct file *file, int mode, loff_t offset,
@@ -2261,7 +2267,7 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
 	if (iocb->ki_left == 0)
 		return 0;
 
-	vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
+	sb_start_write(inode->i_sb);
 
 	appending = file->f_flags & O_APPEND ? 1 : 0;
 	direct_io = file->f_flags & O_DIRECT ? 1 : 0;
@@ -2422,8 +2428,10 @@ out_dio:
 		unaligned_dio = 0;
 	}
 
-	if (unaligned_dio)
+	if (unaligned_dio) {
+		ocfs2_iocb_clear_unaligned_aio(iocb);
 		atomic_dec(&OCFS2_I(inode)->ip_unaligned_aio);
+	}
 
 out:
 	if (rw_level != -1)
@@ -2434,6 +2442,7 @@ out_sems:
 		ocfs2_iocb_clear_sem_locked(iocb);
 
 	mutex_unlock(&inode->i_mutex);
+	sb_end_write(inode->i_sb);
 
 	if (written)
 		ret = written;
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index d96f7f81d8dd..f20edcbfe700 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -928,7 +928,12 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		if (get_user(new_clusters, (int __user *)arg))
 			return -EFAULT;
 
-		return ocfs2_group_extend(inode, new_clusters);
+		status = mnt_want_write_file(filp);
+		if (status)
+			return status;
+		status = ocfs2_group_extend(inode, new_clusters);
+		mnt_drop_write_file(filp);
+		return status;
 	case OCFS2_IOC_GROUP_ADD:
 	case OCFS2_IOC_GROUP_ADD64:
 		if (!capable(CAP_SYS_RESOURCE))
@@ -937,7 +942,12 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
 			return -EFAULT;
 
-		return ocfs2_group_add(inode, &input);
+		status = mnt_want_write_file(filp);
+		if (status)
+			return status;
+		status = ocfs2_group_add(inode, &input);
+		mnt_drop_write_file(filp);
+		return status;
 	case OCFS2_IOC_REFLINK:
 		if (copy_from_user(&args, argp, sizeof(args)))
 			return -EFAULT;
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 0a42ae96dca7..2dd36af79e26 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -355,11 +355,14 @@ handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs)
 	if (journal_current_handle())
 		return jbd2_journal_start(journal, max_buffs);
 
+	sb_start_intwrite(osb->sb);
+
 	down_read(&osb->journal->j_trans_barrier);
 
 	handle = jbd2_journal_start(journal, max_buffs);
 	if (IS_ERR(handle)) {
 		up_read(&osb->journal->j_trans_barrier);
+		sb_end_intwrite(osb->sb);
 
 		mlog_errno(PTR_ERR(handle));
 
@@ -388,8 +391,10 @@ int ocfs2_commit_trans(struct ocfs2_super *osb,
 	if (ret < 0)
 		mlog_errno(ret);
 
-	if (!nested)
+	if (!nested) {
 		up_read(&journal->j_trans_barrier);
+		sb_end_intwrite(osb->sb);
+	}
 
 	return ret;
 }
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 210c35237548..a9f78c74d687 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -784,14 +784,10 @@ bail:
 
 static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
 {
-	int i;
-	u8 *buffer;
-	u32 count = 0;
+	u32 count;
 	struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
 
-	buffer = la->la_bitmap;
-	for (i = 0; i < le16_to_cpu(la->la_size); i++)
-		count += hweight8(buffer[i]);
+	count = memweight(la->la_bitmap, le16_to_cpu(la->la_size));
 
 	trace_ocfs2_local_alloc_count_bits(count);
 	return count;
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 9cd41083e991..d150372fd81d 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -136,6 +136,7 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 	sigset_t oldset;
 	int ret;
 
+	sb_start_pagefault(inode->i_sb);
 	ocfs2_block_signals(&oldset);
 
 	/*
@@ -165,6 +166,7 @@ static int ocfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 
 out:
 	ocfs2_unblock_signals(&oldset);
+	sb_end_pagefault(inode->i_sb);
 	return ret;
 }
 
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 9f39c640cddf..f1fd0741162b 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -98,7 +98,7 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
 #define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
 
 static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
-				   struct nameidata *nd)
+				   unsigned int flags)
 {
 	int status;
 	u64 blkno;
@@ -618,7 +618,7 @@ static int ocfs2_mkdir(struct inode *dir,
 static int ocfs2_create(struct inode *dir,
 			struct dentry *dentry,
 			umode_t mode,
-			struct nameidata *nd)
+			bool excl)
 {
 	int ret;
 
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 92fcd575775a..0a86e302655f 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -399,8 +399,6 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
 			      msecs_to_jiffies(oinfo->dqi_syncms));
 
 out_err:
-	if (status)
-		mlog_errno(status);
 	return status;
 out_unlock:
 	ocfs2_unlock_global_qf(oinfo, 0);
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 9f32d7cbb7a3..30a055049e16 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -4466,20 +4466,11 @@ int ocfs2_reflink_ioctl(struct inode *inode,
 		goto out_dput;
 	}
 
-	error = mnt_want_write(new_path.mnt);
-	if (error) {
-		mlog_errno(error);
-		goto out_dput;
-	}
-
 	error = ocfs2_vfs_reflink(old_path.dentry,
 				  new_path.dentry->d_inode,
 				  new_dentry, preserve);
-	mnt_drop_write(new_path.mnt);
 out_dput:
-	dput(new_dentry);
-	mutex_unlock(&new_path.dentry->d_inode->i_mutex);
-	path_put(&new_path);
+	done_path_create(&new_path, new_dentry);
 out:
 	path_put(&old_path);