writeback: remove writeback_inodes_wbc

This was just an odd wrapper around writeback_inodes_wb.  Removing this
also allows to get rid of the bdi member of struct writeback_control
which was rather out of place there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

6 files changed, 6 insertions, 20 deletions

diff --git a/fs/afs/write.c b/fs/afs/write.c
index 3dab9e9948d0..722743b152d8 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -680,7 +680,6 @@ int afs_writeback_all(struct afs_vnode *vnode)
 {
         struct address_space *mapping = vnode->vfs_inode.i_mapping;
         struct writeback_control wbc = {
-                .bdi            = mapping->backing_dev_info,
                 .sync_mode      = WB_SYNC_ALL,
                 .nr_to_write    = LONG_MAX,
                 .range_cyclic   = 1,
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index a4080c21ec55..d74e6af9b53a 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2594,7 +2594,6 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
                 .sync_io = wbc->sync_mode == WB_SYNC_ALL,
         };
         struct writeback_control wbc_writepages = {
-                .bdi            = wbc->bdi,
                 .sync_mode      = wbc->sync_mode,
                 .older_than_this = NULL,
                 .nr_to_write    = 64,
@@ -2628,7 +2627,6 @@ int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
                 .sync_io = mode == WB_SYNC_ALL,
         };
         struct writeback_control wbc_writepages = {
-                .bdi            = inode->i_mapping->backing_dev_info,
                 .sync_mode      = mode,
                 .older_than_this = NULL,
                 .nr_to_write    = nr_pages * 2,
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 6981e4b7c148..94a602e98bb5 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -614,8 +614,8 @@ static int writeback_sb_inodes(struct super_block *sb,
         return 1;
 }
 
-static void writeback_inodes_wb(struct bdi_writeback *wb,
-                                struct writeback_control *wbc)
+void writeback_inodes_wb(struct bdi_writeback *wb,
+                struct writeback_control *wbc)
 {
         int ret = 0;
 
@@ -660,13 +660,6 @@ static void writeback_inodes_wb(struct bdi_writeback *wb,
         /* Leave any unwritten inodes on b_io */
 }
 
-void writeback_inodes_wbc(struct writeback_control *wbc)
-{
-        struct backing_dev_info *bdi = wbc->bdi;
-
-        writeback_inodes_wb(&bdi->wb, wbc);
-}
-
 /*
  * The maximum number of pages to writeout in a single bdi flush/kupdate
  * operation.  We do this so we don't hold I_SYNC against an inode for
@@ -705,7 +698,6 @@ static long wb_writeback(struct bdi_writeback *wb,
                          struct wb_writeback_args *args)
 {
         struct writeback_control wbc = {
-                .bdi                    = wb->bdi,
                 .sb                     = args->sb,
                 .sync_mode              = args->sync_mode,
                 .older_than_this        = NULL,
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index d63ef8f9609f..f6756f6a610c 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -27,8 +27,6 @@ enum writeback_sync_modes {
  * in a manner such that unspecified fields are set to zero.
  */
 struct writeback_control {
-        struct backing_dev_info *bdi;   /* If !NULL, only write back this
-                                           queue */
         struct super_block *sb;         /* if !NULL, only write inodes from
                                            this super_block */
         enum writeback_sync_modes sync_mode;
@@ -66,7 +64,8 @@ int inode_wait(void *);
 void writeback_inodes_sb(struct super_block *);
 int writeback_inodes_sb_if_idle(struct super_block *);
 void sync_inodes_sb(struct super_block *);
-void writeback_inodes_wbc(struct writeback_control *wbc);
+void writeback_inodes_wb(struct bdi_writeback *wb,
+                struct writeback_control *wbc);
 long wb_do_writeback(struct bdi_writeback *wb, int force_wait);
 void wakeup_flusher_threads(long nr_pages);
 
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 660a87a22511..6e0b09a1ec2c 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -340,14 +340,13 @@ int bdi_has_dirty_io(struct backing_dev_info *bdi)
 static void bdi_flush_io(struct backing_dev_info *bdi)
 {
         struct writeback_control wbc = {
-                .bdi                    = bdi,
                 .sync_mode              = WB_SYNC_NONE,
                 .older_than_this        = NULL,
                 .range_cyclic           = 1,
                 .nr_to_write            = 1024,
         };
 
-        writeback_inodes_wbc(&wbc);
+        writeback_inodes_wb(&bdi->wb, &wbc);
 }
 
 /*
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 54f28bd493d3..37498ef61548 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -495,7 +495,6 @@ static void balance_dirty_pages(struct address_space *mapping,
 
         for (;;) {
                 struct writeback_control wbc = {
-                        .bdi            = bdi,
                         .sync_mode      = WB_SYNC_NONE,
                         .older_than_this = NULL,
                         .nr_to_write    = write_chunk,
@@ -537,7 +536,7 @@ static void balance_dirty_pages(struct address_space *mapping,
                  * up.
                  */
                 if (bdi_nr_reclaimable > bdi_thresh) {
-                        writeback_inodes_wbc(&wbc);
+                        writeback_inodes_wb(&bdi->wb, &wbc);
                         pages_written += write_chunk - wbc.nr_to_write;
                         get_dirty_limits(&background_thresh, &dirty_thresh,
                                        &bdi_thresh, bdi);