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authorRobert Richter <robert.richter@amd.com>2008-09-24 11:25:31 +0200
committerRobert Richter <robert.richter@amd.com>2008-09-24 11:25:31 +0200
commitf78e80209cf143be49f268c340431ae9fa3abb74 (patch)
tree820fa64b688099dfdd93d27ba03252738ca5c7e2 /arch/x86/oprofile
parent4c168eaf7ea39f25a45a3d8c7eebc3fedb633a1d (diff)
parent24342c34a022ee90839873d91396045e12ef1090 (diff)
downloadlinux-f78e80209cf143be49f268c340431ae9fa3abb74.tar.bz2
Merge commit 'v2.6.27-rc5' into tip/oprofile
Conflicts: arch/x86/oprofile/nmi_int.c
Diffstat (limited to 'arch/x86/oprofile')
-rw-r--r--arch/x86/oprofile/nmi_int.c39
1 files changed, 36 insertions, 3 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 287513a09819..d98857410746 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -16,6 +16,7 @@
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/kdebug.h>
+#include <linux/cpu.h>
#include <asm/nmi.h>
#include <asm/msr.h>
#include <asm/apic.h>
@@ -29,23 +30,48 @@ static DEFINE_PER_CPU(unsigned long, saved_lvtpc);
static int nmi_start(void);
static void nmi_stop(void);
+static void nmi_cpu_start(void *dummy);
+static void nmi_cpu_stop(void *dummy);
/* 0 == registered but off, 1 == registered and on */
static int nmi_enabled = 0;
+#ifdef CONFIG_SMP
+static int oprofile_cpu_notifier(struct notifier_block *b, unsigned long action,
+ void *data)
+{
+ int cpu = (unsigned long)data;
+ switch (action) {
+ case CPU_DOWN_FAILED:
+ case CPU_ONLINE:
+ smp_call_function_single(cpu, nmi_cpu_start, NULL, 0);
+ break;
+ case CPU_DOWN_PREPARE:
+ smp_call_function_single(cpu, nmi_cpu_stop, NULL, 1);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block oprofile_cpu_nb = {
+ .notifier_call = oprofile_cpu_notifier
+};
+#endif
+
#ifdef CONFIG_PM
static int nmi_suspend(struct sys_device *dev, pm_message_t state)
{
+ /* Only one CPU left, just stop that one */
if (nmi_enabled == 1)
- nmi_stop();
+ nmi_cpu_stop(NULL);
return 0;
}
static int nmi_resume(struct sys_device *dev)
{
if (nmi_enabled == 1)
- nmi_start();
+ nmi_cpu_start(NULL);
return 0;
}
@@ -468,6 +494,9 @@ int __init op_nmi_init(struct oprofile_operations *ops)
return -ENODEV;
}
+#ifdef CONFIG_SMP
+ register_cpu_notifier(&oprofile_cpu_nb);
+#endif
/* default values, can be overwritten by model */
ops->create_files = nmi_create_files;
ops->setup = nmi_setup;
@@ -489,8 +518,12 @@ int __init op_nmi_init(struct oprofile_operations *ops)
void op_nmi_exit(void)
{
- if (using_nmi)
+ if (using_nmi) {
exit_sysfs();
+#ifdef CONFIG_SMP
+ unregister_cpu_notifier(&oprofile_cpu_nb);
+#endif
+ }
if (model->exit)
model->exit();
}