Re: [PATCH net] psp: use unrcu_pointer() for the cmpxchg() on netdev psp_dev

On Thu, Aug 13, 2026 at 12:57 PM Daniel Zahka [off-list ref] wrote:

quoted

On 8/13/26 3:34 PM, Wei Wang wrote:

quoted

From: Wei Wang <redacted>

sparse reports:

   net/psp/psp_nl.c:513:13: sparse: sparse: cast removes address space
   '__rcu' of expression

cmpxchg() returns typeof(*ptr) and its internal casts strip the __rcu
annotation. Wrap it in unrcu_pointer(), the documented way to use an
__rcu pointer with xchg() and friends.

This was introduced by commit 06c2dce2d0f6 ("psp: add new netlink cmd
for dev-assoc and dev-disassoc").

No functional change intended.

Reported-by: kernel test robot <redacted>
Closes: https://lore.kernel.org/oe-kbuild-all/202608080910.l9KvOH7O-lkp@intel.com/ (local)
Signed-off-by: Wei Wang <redacted>

Commits targeting the net tree need a fixes tag.

This is a sparse warning fix, my understanding is that it's not a
functional fix and therefore should not use a Fixes tag. Please let me
know if my understanding is wrong.