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authorBob Breuer <breuerr@mc.net>2006-06-20 00:28:33 -0700
committerDavid S. Miller <davem@davemloft.net>2006-06-20 00:28:33 -0700
commita8cbdcea341ac2f404ee81aa1c19d54aaa0416b4 (patch)
treeb9aa7ac16fcbe287001bd27080a27b41db7eeb5b
parent25f42b6af09e34c3f92107b36b5aa6edc2fdba2f (diff)
[SPARC]: Add topology_init()
Fix a crash in SMP mode by adding the missing topology_init. Also makes /proc/cpuinfo backwards compatible with 2.4. Signed-off-by: Bob Breuer <breuerr@mc.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc/kernel/setup.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c
index 3509e4305532..8531a8e15832 100644
--- a/arch/sparc/kernel/setup.c
+++ b/arch/sparc/kernel/setup.c
@@ -31,6 +31,7 @@
#include <linux/console.h>
#include <linux/spinlock.h>
#include <linux/root_dev.h>
+#include <linux/cpu.h>
#include <asm/system.h>
#include <asm/io.h>
@@ -389,6 +390,8 @@ console_initcall(set_preferred_console);
extern char *sparc_cpu_type;
extern char *sparc_fpu_type;
+static int ncpus_probed;
+
static int show_cpuinfo(struct seq_file *m, void *__unused)
{
seq_printf(m,
@@ -411,7 +414,7 @@ static int show_cpuinfo(struct seq_file *m, void *__unused)
romvec->pv_printrev >> 16,
romvec->pv_printrev & 0xffff,
&cputypval,
- num_possible_cpus(),
+ ncpus_probed,
num_online_cpus()
#ifndef CONFIG_SMP
, cpu_data(0).udelay_val/(500000/HZ),
@@ -471,3 +474,30 @@ void sun_do_break(void)
int serial_console = -1;
int stop_a_enabled = 1;
+
+static int __init topology_init(void)
+{
+ int i, ncpus, err;
+
+ /* Count the number of physically present processors in
+ * the machine, even on uniprocessor, so that /proc/cpuinfo
+ * output is consistent with 2.4.x
+ */
+ ncpus = 0;
+ while (!cpu_find_by_instance(ncpus, NULL, NULL))
+ ncpus++;
+ ncpus_probed = ncpus;
+
+ err = 0;
+ for_each_online_cpu(i) {
+ struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ err = -ENOMEM;
+ else
+ register_cpu(p, i, NULL);
+ }
+
+ return err;
+}
+
+subsys_initcall(topology_init);