nvme: add context annotations for nvme_ns_head::srcu

Add Clang lock context annotations for helpers that operate under
head->srcu read-side protection.

The path selection helpers invoked by nvme_find_path() access SRCU-
protected data through srcu_dereference() or list APIs which iterate
through rcu protected list and therefore require the caller to hold
head->srcu. Annotate these helpers and nvme_find_path() with
__must_hold_shared(&head->srcu) so that Clang's lock context analysis
can verify the SRCU locking requirements across the call chain.

Also update nvme_ns_head_ctrl_ioctl() to use __releases_shared()
to match the shared SRCU read-side lock acquired through
srcu_read_lock().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nilay Shroff <nilay@linux.ibm.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

0 files changed, 0 insertions, 0 deletions