2.6.23-rc7-mm1: r/o mounts joke with lockdep

[Alexey Dobriyan]

static void lock_and_coalesce_cpu_mnt_writer_counts(void)
{
	int cpu;
	struct mnt_writer *cpu_writer;

	for_each_possible_cpu(cpu) {
		cpu_writer = &per_cpu(mnt_writers, cpu);
		spin_lock_nested(&cpu_writer->lock, 42);
		                                   ^^^^

What the heck is going on? Given that MAX_LOCKDEP_SUBCLASSES is only 8,
this reliably turns off lockdep at boot.

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