NeilBrown
f2ea68cf42
md: only count actual openers as access which prevent a 'stop' ...
Open isn't the only thing that increments ->active. e.g. reading
/proc/mdstat will increment it briefly. So to avoid false positives
in testing for concurrent access, introduce a new counter that counts
just the number of times the md device it open.
Signed-off-by: NeilBrown <neilb@suse.de>
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f2ea68cf42