On Thu, Aug 30, 2018 at 09:53:46PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@xxxxxxxxx> > > To know when to create a blkg, the general pattern is to do a > blkg_lookup and if that fails, lock and then do a lookup again and if > that fails finally create. It doesn't make much sense for everyone who > wants to do creation to write this themselves. > > This changes blkg_lookup_create to do locking and implement this > pattern. The old blkg_lookup_create is renamed to __blkg_lookup_create. > If a call site wants to do its own error handling or already owns the > queue lock, they can use __blkg_lookup_create. > > Signed-off-by: Dennis Zhou <dennisszhou@xxxxxxxxx> Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx> Thanks, Josef
