nvme: add context annotations for nvme_ns_head::srcu

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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>

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This commit is contained in:

Nilay Shroff 2026-07-13 17:24:06 +05:30 • committed by Keith Busch

parent a6732bd800

commit 86f9536c2d

3 changed files with 9 additions and 2 deletions

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2

drivers/nvme/host/ioctl.c

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6

drivers/nvme/host/multipath.c

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3

drivers/nvme/host/nvme.h

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