smp: don't declare nr_cpu_ids if NR_CPUS == 1

SMP and NR_CPUS are independent options, hence nr_cpu_ids may be
declared even if NR_CPUS == 1, which is useless.

Signed-off-by: Yury Norov <yury.norov@gmail.com>

diff --git a/kernel/smp.c b/kernel/smp.c
index 650810a6f29b3a1ef2a2554b6f9272067715b4c8..e971c9626a1ba9e4a1caee133d2beda0e9e82552 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -1088,9 +1088,11 @@ static int __init maxcpus(char *str)
 
 early_param("maxcpus", maxcpus);
 
+#if (NR_CPUS > 1)
 /* Setup number of possible processor ids */
 unsigned int nr_cpu_ids __read_mostly = NR_CPUS;
 EXPORT_SYMBOL(nr_cpu_ids);
+#endif
 
 /* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */
 void __init setup_nr_cpu_ids(void)