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Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL

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btrfs inialize rb trees in quite a number of places by settin rb_node =
NULL;  The problem with this is that 17d9ddc72f in the
linux-next tree adds a new field to that struct which needs to be NULL for
the new rbtree library code to work properly.  This patch uses RB_ROOT as
the intializer so all of the relevant fields will be NULL'd.  Without the
patch I get a panic.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Eric Paris
2010-02-23 19:43:04 +00:00
committed by Chris Mason
parent 3f6fae9559
commit 6bef4d3171
8 changed files with 12 additions and 12 deletions
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4
fs/btrfs/extent_io.c
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@@ -104,8 +104,8 @@ void extent_io_exit(void)
void extent_io_tree_init(struct extent_io_tree *tree,
struct address_space *mapping, gfp_t mask)
{
tree->state.rb_node = NULL;
tree->buffer.rb_node = NULL;
tree->state = RB_ROOT;
tree->buffer = RB_ROOT;
tree->ops = NULL;
tree->dirty_bytes = 0;
spin_lock_init(&tree->lock);