tree 754e213bc201cd338dd6bffa6877872b1e0dcc93
parent ab10867621a96230757eb4a2a19d560b85f62ce9
author Roland Dreier <rolandd@cisco.com> 1158963440 -0700
committer Roland Dreier <rolandd@cisco.com> 1158963440 -0700

IB/uverbs: Fix lockdep warning when QP is created with 2 CQs

Lockdep warns when userspace creates a QP that uses different CQs for
send completions and receive completions, because both CQs are locked
and their mutexes belong to the same lock class.  However, we know
that the mutexes are distinct and the nesting is safe (there is no
possibility of AB-BA deadlock because the mutexes are locked with
down_read()), so annotate the situation with SINGLE_DEPTH_NESTING to
get rid of the lockdep warning.

Signed-off-by: Roland Dreier <rolandd@cisco.com>