Function report |
Source Code:mm\backing-dev.c |
Create Date:2022-07-28 14:24:23 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:di_get_by_id - lookup and get bdi from its id*@id: bdi id to lookup* Find bdi matching @id and get it. Returns NULL if the matching bdi* doesn't exist or is already unregistered.
Proto:struct backing_dev_info *bdi_get_by_id(u64 id)
Type:struct backing_dev_info
Parameter:
Type | Parameter | Name |
---|---|---|
u64 | id |
919 | struct backing_dev_info * bdi = NULL |
922 | spin_lock_bh( & di_lock protects bdi_tree and updates to bdi_list. bdi_list has RCU* reader side locking.) |
923 | p = bdi_lookup_rb_node(id, NULL) |
924 | If p Then |
928 | spin_unlock_bh( & di_lock protects bdi_tree and updates to bdi_list. bdi_list has RCU* reader side locking.) |
930 | Return bdi |
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