diff options
| author | Robert Richter <robert.richter@amd.com> | 2010-05-03 17:00:25 +0400 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2010-05-06 15:15:39 +0400 |
| commit | 3de668ee8d5b1e08da3200f926ff5a28aeb99bc2 (patch) | |
| tree | 3fd1aa6337b39ccd8fc414cbbba3013180392c84 /arch/x86/oprofile | |
| parent | d30d64c6da3ec7a0708bfffa7e05752d5b9a1093 (diff) | |
| download | linux-3de668ee8d5b1e08da3200f926ff5a28aeb99bc2.tar.xz | |
oprofile/x86: notify cpus only when daemon is running
This patch moves the cpu notifier registration from nmi_init() to
nmi_setup(). The corresponding unregistration function is now in
nmi_shutdown(). Thus, the hotplug code is only active, if the oprofile
daemon is running.
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'arch/x86/oprofile')
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 7de0572b0a5e..2a086726cad1 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -504,6 +504,7 @@ static int nmi_setup(void) goto fail; get_online_cpus(); + register_cpu_notifier(&oprofile_cpu_nb); on_each_cpu(nmi_cpu_setup, NULL, 1); nmi_enabled = 1; put_online_cpus(); @@ -519,6 +520,7 @@ static void nmi_shutdown(void) struct op_msrs *msrs; get_online_cpus(); + unregister_cpu_notifier(&oprofile_cpu_nb); on_each_cpu(nmi_cpu_shutdown, NULL, 1); nmi_enabled = 0; ctr_running = 0; @@ -739,12 +741,6 @@ int __init op_nmi_init(struct oprofile_operations *ops) return -ENODEV; } - get_online_cpus(); - register_cpu_notifier(&oprofile_cpu_nb); - nmi_enabled = 0; - ctr_running = 0; - put_online_cpus(); - /* default values, can be overwritten by model */ ops->create_files = nmi_create_files; ops->setup = nmi_setup; @@ -771,14 +767,8 @@ int __init op_nmi_init(struct oprofile_operations *ops) void op_nmi_exit(void) { - if (using_nmi) { + if (using_nmi) exit_sysfs(); - get_online_cpus(); - unregister_cpu_notifier(&oprofile_cpu_nb); - nmi_enabled = 0; - ctr_running = 0; - put_online_cpus(); - } if (model->exit) model->exit(); } |