nvme: add context annotations for nvme_subsystem::lock

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Several helpers access or traverse data structures protected by
nvme_subsystem::lock and therefore require callers to hold the lock.
Annotate nvme_mpath_unfreeze(), nvme_mpath_wait_freeze(),
nvme_mpath_start_freeze(), nvme_find_ns_head(), nvme_alloc_ns_head()
and nvme_subsys_check_duplicate_ids() with __must_hold(&subsys->lock)
so that Clang's lock context analysis can validate the locking
requirements at compile time.

Also annotate nvme_subsystem::nsheads and
nvme_ns_head::delayed_removal_secs with __guarded_by(&subsys->lock),
as both are protected by the subsystem lock.

Annotate nvme_init_subsystem() with __context_unsafe(), as it
initializes these lock-protected members before the object is published,
suppressing a false positive from Clang's context analysis.

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

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This commit is contained in:

Nilay Shroff 2026-07-13 17:24:12 +05:30 • committed by Keith Busch

parent 9c65eeeb26

commit d1fdf49b5f

2 changed files with 14 additions and 5 deletions

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4

drivers/nvme/host/core.c

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15

drivers/nvme/host/nvme.h

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