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Store the owner CPU number in the lock word so it may be yielded to, as powerpc's paravirtualised simple spinlocks do. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221126095932.1234527-7-npiggin@gmail.com