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bdi: move bdi_dev_name out of line

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[ Upstream commit eb7ae5e06bb6e6ac6bb86872d27c43ebab92f6b2 ]

bdi_dev_name is not a fast path function, move it out of line.  This
prepares for using it from modular callers without having to export
an implementation detail like bdi_unknown_name.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Christoph Hellwig 2020-05-04 14:47:54 +02:00 • committed by Greg Kroah-Hartman
commit 25390a3198
2 changed files with 10 additions and 9 deletions
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10
mm/backing-dev.c
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@ -21,7 +21,7 @@ struct backing_dev_info noop_backing_dev_info = {
EXPORT_SYMBOL_GPL(noop_backing_dev_info);
static struct class *bdi_class;
const char *bdi_unknown_name = "(unknown)";
static const char *bdi_unknown_name = "(unknown)";
/*
* bdi_lock protects bdi_tree and updates to bdi_list. bdi_list has RCU
@ -1043,6 +1043,14 @@ void bdi_put(struct backing_dev_info *bdi)
}
EXPORT_SYMBOL(bdi_put);
const char *bdi_dev_name(struct backing_dev_info *bdi)
{
if (!bdi || !bdi->dev)
return bdi_unknown_name;
return dev_name(bdi->dev);
}
EXPORT_SYMBOL_GPL(bdi_dev_name);
static wait_queue_head_t congestion_wqh[2] = {
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[0]),
__WAIT_QUEUE_HEAD_INITIALIZER(congestion_wqh[1])