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authorJan Kara <jack@suse.cz>2017-04-12 12:24:48 +0200
committerJens Axboe <axboe@fb.com>2017-04-20 12:09:55 -0600
commit2e82b84c01d9438d86079980e22e036eee71e754 (patch)
tree9653b73160e4fbc3764758e9a69411031f9c4f00 /mm
parentfs: Remove SB_I_DYNBDI flag (diff)
downloadlinux-dev-2e82b84c01d9438d86079980e22e036eee71e754.tar.xz
linux-dev-2e82b84c01d9438d86079980e22e036eee71e754.zip
block: Remove unused functions
Now that all backing_dev_info structure are allocated separately, we can drop some unused functions. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to '')
-rw-r--r--mm/backing-dev.c56
1 files changed, 6 insertions, 50 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 3dd175986390..4dcd56947f2a 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -12,8 +12,6 @@
#include <linux/device.h>
#include <trace/events/writeback.h>
-static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
-
struct backing_dev_info noop_backing_dev_info = {
.name = "noop",
.capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
@@ -242,6 +240,8 @@ static __init int bdi_class_init(void)
}
postcore_initcall(bdi_class_init);
+static int bdi_init(struct backing_dev_info *bdi);
+
static int __init default_bdi_init(void)
{
int err;
@@ -820,7 +820,7 @@ static void cgwb_remove_from_bdi_list(struct bdi_writeback *wb)
#endif /* CONFIG_CGROUP_WRITEBACK */
-int bdi_init(struct backing_dev_info *bdi)
+static int bdi_init(struct backing_dev_info *bdi)
{
int ret;
@@ -838,7 +838,6 @@ int bdi_init(struct backing_dev_info *bdi)
return ret;
}
-EXPORT_SYMBOL(bdi_init);
struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id)
{
@@ -897,12 +896,6 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
}
EXPORT_SYMBOL(bdi_register);
-int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev)
-{
- return bdi_register(bdi, NULL, "%u:%u", MAJOR(dev), MINOR(dev));
-}
-EXPORT_SYMBOL(bdi_register_dev);
-
int bdi_register_owner(struct backing_dev_info *bdi, struct device *owner)
{
int rc;
@@ -950,13 +943,6 @@ void bdi_unregister(struct backing_dev_info *bdi)
}
}
-static void bdi_exit(struct backing_dev_info *bdi)
-{
- WARN_ON_ONCE(bdi->dev);
- wb_exit(&bdi->wb);
- cgwb_bdi_exit(bdi);
-}
-
static void release_bdi(struct kref *ref)
{
struct backing_dev_info *bdi =
@@ -964,7 +950,9 @@ static void release_bdi(struct kref *ref)
if (test_bit(WB_registered, &bdi->wb.state))
bdi_unregister(bdi);
- bdi_exit(bdi);
+ WARN_ON_ONCE(bdi->dev);
+ wb_exit(&bdi->wb);
+ cgwb_bdi_exit(bdi);
kfree(bdi);
}
@@ -974,38 +962,6 @@ void bdi_put(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL(bdi_put);
-void bdi_destroy(struct backing_dev_info *bdi)
-{
- bdi_unregister(bdi);
- bdi_exit(bdi);
-}
-EXPORT_SYMBOL(bdi_destroy);
-
-/*
- * For use from filesystems to quickly init and register a bdi associated
- * with dirty writeback
- */
-int bdi_setup_and_register(struct backing_dev_info *bdi, char *name)
-{
- int err;
-
- bdi->name = name;
- bdi->capabilities = 0;
- err = bdi_init(bdi);
- if (err)
- return err;
-
- err = bdi_register(bdi, NULL, "%.28s-%ld", name,
- atomic_long_inc_return(&bdi_seq));
- if (err) {
- bdi_destroy(bdi);
- return err;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(bdi_setup_and_register);
-
static wait_queue_head_t congestion_wqh[2] = {
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[0]),
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[1])