mm: bdi init hooks

provide BDI constructor/destructor hooks

[akpm@linux-foundation.org: compile fix]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 5448f625ab56..ca30b6ac03f0 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -401,6 +401,7 @@ static int fuse_show_options(struct seq_file *m, struct vfsmount *mnt)
 static struct fuse_conn *new_conn(void)
 {
         struct fuse_conn *fc;
+        int err;
 
         fc = kzalloc(sizeof(*fc), GFP_KERNEL);
         if (fc) {
@@ -416,10 +417,17 @@ static struct fuse_conn *new_conn(void)
                 atomic_set(&fc->num_waiting, 0);
                 fc->bdi.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
                 fc->bdi.unplug_io_fn = default_unplug_io_fn;
+                err = bdi_init(&fc->bdi);
+                if (err) {
+                        kfree(fc);
+                        fc = NULL;
+                        goto out;
+                }
                 fc->reqctr = 0;
                 fc->blocked = 1;
                 get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
         }
+out:
         return fc;
 }
 
@@ -429,6 +437,7 @@ void fuse_conn_put(struct fuse_conn *fc)
                 if (fc->destroy_req)
                         fuse_request_free(fc->destroy_req);
                 mutex_destroy(&fc->inst_mutex);
+                bdi_destroy(&fc->bdi);
                 kfree(fc);
         }
 }