Subject: add back in btrfs commit_root_sem.
From: rt-2.6.31-rc4-rt1
Seems to be in flux, but these are required for the status-quo to compile.
Not run-time tested.
Signed-off-by: Sven-Thorsten Dietrich <sdietrich@xxxxxxx>
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -942,6 +959,9 @@ struct btrfs_root {
/* the node lock is held while changing the node pointer */
spinlock_t node_lock;
+ /* taken when updating the commit root */
+ struct rw_semaphore commit_root_sem;
+
struct extent_buffer *commit_root;
struct btrfs_root *log_root;
struct btrfs_root *reloc_root;
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -909,6 +909,7 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
spin_lock_init(&root->inode_lock);
mutex_init(&root->objectid_mutex);
mutex_init(&root->log_mutex);
+ init_rwsem(&root->commit_root_sem);
init_waitqueue_head(&root->log_writer_wait);
init_waitqueue_head(&root->log_commit_wait[0]);
init_waitqueue_head(&root->log_commit_wait[1]);
--
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