ubifs: Add comment on c->commit_sem

Every single time I come across that code, I get confused
because it looks like a possible dead lock.
Help myself by adding a comment.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2018-08-13 15:14:45 +02:00
commit 49d2e05fb4