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authorMike Travis <travis@sgi.com>2008-03-26 14:23:48 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:44:59 +0200
commite0982e90cd1ecf59818b137386b7f63debded9cc (patch)
tree3cdbfa8a69dca4a9c9596d61bffa32f1b676f09d /init
parent4bdbaad33d0f4d0e9818a38a825f5b75c0296a28 (diff)
downloadlinux-stericsson-e0982e90cd1ecf59818b137386b7f63debded9cc.tar.gz
init: move setup of nr_cpu_ids to as early as possible
Move the setting of nr_cpu_ids from sched_init() to start_kernel() so that it's available as early as possible. Note that an arch has the option of setting it even earlier if need be, but it should not result in a different value than the setup_nr_cpu_ids() function. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
-rw-r--r--init/main.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 2df3f0617fdc..833a67df1f7e 100644
--- a/init/main.c
+++ b/init/main.c
@@ -359,6 +359,7 @@ static void __init smp_init(void)
#endif
static inline void setup_per_cpu_areas(void) { }
+static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#else
@@ -368,6 +369,21 @@ cpumask_t cpu_mask_all __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_mask_all);
#endif
+/* Setup number of possible processor ids */
+int nr_cpu_ids __read_mostly = NR_CPUS;
+EXPORT_SYMBOL(nr_cpu_ids);
+
+/* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */
+static void __init setup_nr_cpu_ids(void)
+{
+ int cpu, highest_cpu = 0;
+
+ for_each_possible_cpu(cpu)
+ highest_cpu = cpu;
+
+ nr_cpu_ids = highest_cpu + 1;
+}
+
#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
@@ -542,6 +558,7 @@ asmlinkage void __init start_kernel(void)
setup_command_line(command_line);
unwind_setup();
setup_per_cpu_areas();
+ setup_nr_cpu_ids();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
/*