[PATCH 4/7] writeback: get rid of task/current_is_pdflush()

[Jens Axboe <jens.axboe@oracle.com>]

There's just a single user in the kernel and Chris says it's safe to kill.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
 fs/btrfs/disk-io.c        |    2 +-
 include/linux/writeback.h |   11 -----------
 2 files changed, 1 insertions(+), 12 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 3e18175..6ec80c0 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2385,7 +2385,7 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
 	unsigned long thresh = 32 * 1024 * 1024;
 	tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
 
-	if (current_is_pdflush() || current->flags & PF_MEMALLOC)
+	if (current->flags & PF_MEMALLOC)
 		return;
 
 	num_dirty = count_range_bits(tree, &start, (u64)-1,
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 724327b..f96fea3 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -14,17 +14,6 @@ extern struct list_head inode_in_use;
 extern struct list_head inode_unused;
 
 /*
- * Yes, writeback.h requires sched.h
- * No, sched.h is not included from here.
- */
-static inline int task_is_pdflush(struct task_struct *task)
-{
-	return task->flags & PF_FLUSHER;
-}
-
-#define current_is_pdflush()	task_is_pdflush(current)
-
-/*
  * fs/fs-writeback.c
  */
 enum writeback_sync_modes {
-- 
1.6.2