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-rw-r--r--mm/backing-dev.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 027100d30227..8fe9d3407921 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -14,17 +14,11 @@
14 14
15static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); 15static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
16 16
17void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
18{
19}
20EXPORT_SYMBOL(default_unplug_io_fn);
21
22struct backing_dev_info default_backing_dev_info = { 17struct backing_dev_info default_backing_dev_info = {
23 .name = "default", 18 .name = "default",
24 .ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE, 19 .ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE,
25 .state = 0, 20 .state = 0,
26 .capabilities = BDI_CAP_MAP_COPY, 21 .capabilities = BDI_CAP_MAP_COPY,
27 .unplug_io_fn = default_unplug_io_fn,
28}; 22};
29EXPORT_SYMBOL_GPL(default_backing_dev_info); 23EXPORT_SYMBOL_GPL(default_backing_dev_info);
30 24
@@ -604,7 +598,7 @@ static void bdi_prune_sb(struct backing_dev_info *bdi)
604 spin_lock(&sb_lock); 598 spin_lock(&sb_lock);
605 list_for_each_entry(sb, &super_blocks, s_list) { 599 list_for_each_entry(sb, &super_blocks, s_list) {
606 if (sb->s_bdi == bdi) 600 if (sb->s_bdi == bdi)
607 sb->s_bdi = NULL; 601 sb->s_bdi = &default_backing_dev_info;
608 } 602 }
609 spin_unlock(&sb_lock); 603 spin_unlock(&sb_lock);
610} 604}