Quick & dirty r4 for 2.6.37

[Kaelyn Uhrain <Kaelyn.Alexi+reiserfs@xxxxxxxxx>]

Here's a quick patch I just made for the resier4-for-2.6.36 patch to
compile against the 2.6.37 sources.  To use, apply
resier4-for-2.6.36.patch to the 2.6.37 kernel sources (ignoring the
one rejected chunk which just adds a comment at the end of
fs/fs-writeback.c) then apply this patch.  My patch is a revert of
766f9164193f6dda1497bbf3861060198421fb92 along with three very small
one-liner changes to fix compilation issues; I haven't had a chance to
test it beyond building the kernel itself, and won't until after I'm
off work tonight.  I also make no claims as to the correctness of my
patch since it is my first venture into the reiser4 and linux fs code.

Cheers,
Kaelyn

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index eb23a9a..d046b99 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -712,7 +712,7 @@ void writeback_skip_sb_inodes(struct super_block *sb,
 
 		if (list_empty(&wb->b_io))
 			break;
-		inode = list_entry(wb->b_io.prev, struct inode, i_list);
+		inode = wb_inode(wb->b_io.prev);
 		if (sb != inode->i_sb)
 			break;
 		redirty_tail(inode);
@@ -834,7 +834,7 @@ int bdi_writeback_thread(void *data)
 	struct backing_dev_info *bdi = wb->bdi;
 	long pages_written;
 
-	current->flags |= PF_SWAPWRITE;
+	current->flags |= PF_FLUSHER | PF_SWAPWRITE;
 	set_freezable();
 	wb->last_active = jiffies;
 
diff --git a/fs/reiser4/jnode.c b/fs/reiser4/jnode.c
index 3eab11a..e5b5943 100644
--- a/fs/reiser4/jnode.c
+++ b/fs/reiser4/jnode.c
@@ -247,8 +247,6 @@ void jnode_init(jnode * node, reiser4_tree * tree, jnode_type type)
 
 	ASSIGN_NODE_LIST(node, NOT_CAPTURED);
 
-	INIT_RCU_HEAD(&node->rcu);
-
 #if REISER4_DEBUG
 	{
 		reiser4_super_info_data *sbinfo;
diff --git a/fs/reiser4/wander.c b/fs/reiser4/wander.c
index 8f75096..2538b66 100644
--- a/fs/reiser4/wander.c
+++ b/fs/reiser4/wander.c
@@ -720,7 +720,7 @@ static int write_jnodes_to_disk_extent(
 	flush_queue_t *fq, int flags)
 {
 	struct super_block *super = reiser4_get_current_sb();
-	int write_op = ( flags & WRITEOUT_BARRIER ) ? WRITE_BARRIER : WRITE;
+	int write_op = ( flags & WRITEOUT_BARRIER ) ? WRITE_FLUSH_FUA : WRITE;
 	int max_blocks;
 	jnode *cur = first;
 	reiser4_block_nr block;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2238745..7667bdf 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1711,6 +1711,7 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *
 #define PF_DUMPCORE	0x00000200	/* dumped core */
 #define PF_SIGNALED	0x00000400	/* killed by a signal */
 #define PF_MEMALLOC	0x00000800	/* Allocating memory */
+#define PF_FLUSHER	0x00001000	/* responsible for disk writeback */
 #define PF_USED_MATH	0x00002000	/* if unset the fpu must be initialized before use */
 #define PF_FREEZING	0x00004000	/* freeze in progress. do not account to load */
 #define PF_NOFREEZE	0x00008000	/* this thread should not be frozen */
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 027100d..956dfec 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -362,7 +362,7 @@ static int bdi_forker_thread(void *ptr)
 {
 	struct bdi_writeback *me = ptr;
 
-	current->flags |= PF_SWAPWRITE;
+	current->flags |= PF_FLUSHER | PF_SWAPWRITE;
 	set_freezable();
 
 	/*