Commit 7ec373cf authored by Mark Fasheh's avatar Mark Fasheh
Browse files

ocfs2: document access rules for blocked_lock_list



ocfs2_super->blocked_lock_list and ocfs2_super->blocked_lock_count have some
usage restrictions which aren't immediately obvious to anyone reading the
code. It's a good idea to document this so that we avoid making costly
mistakes in the future.
Signed-off-by: default avatarMark Fasheh <mark.fasheh@oracle.com>
parent 116ba5d5
......@@ -262,6 +262,12 @@ struct ocfs2_super
unsigned long dc_wake_sequence;
unsigned long dc_work_sequence;
/*
* Any thread can add locks to the list, but the downconvert
* thread is the only one allowed to remove locks. Any change
* to this rule requires updating
* ocfs2_downconvert_thread_do_work().
*/
struct list_head blocked_lock_list;
unsigned long blocked_lock_count;
......
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