[PATCH] fs: remove obsolete comment

[Li RongQing <lirongqing@baidu.com>]

After e8e8a0c6c9b [writeback: move nr_pages == 0 logic to one
location], the nr_page argument of __wakeup_flusher_threads_bdi
has been removed, so remove this obsolete comment

After bc48f001de12225 [buffer: eliminate the need to call
free_more_memory() in __getblk_slow()], no free_more_memory
function

Signed-off-by: Li RongQing <lirongqing@baidu.com>
---
 fs/buffer.c       | 2 +-
 fs/fs-writeback.c | 4 ----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index cabc045f483d..58e199da8ca0 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -924,7 +924,7 @@ grow_dev_page(struct block_device *bdev, sector_t block,
 	struct page *page;
 	struct buffer_head *bh;
 	sector_t end_block;
-	int ret = 0;		/* Will call free_more_memory() */
+	int ret = 0;
 	gfp_t gfp_mask;
 
 	gfp_mask = mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS) | gfp;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 471d863958bc..abafc9bd4622 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1968,10 +1968,6 @@ void wb_workfn(struct work_struct *work)
 	current->flags &= ~PF_SWAPWRITE;
 }
 
-/*
- * Start writeback of `nr_pages' pages on this bdi. If `nr_pages' is zero,
- * write back the whole world.
- */
 static void __wakeup_flusher_threads_bdi(struct backing_dev_info *bdi,
 					 enum wb_reason reason)
 {
-- 
2.16.2