powerpc/mm: Fix assert_pte_locked to work properly on uniprocessor
Since the pte_lockptr is a spinlock it gets optimized away on uniprocessor builds so using spin_is_locked is not correct. We can use assert_spin_locked instead and get the proper behavior between UP and SMP builds. Signed-off-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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