[patch V3 28/28] x86/perf/intel/rapl: Make it modular

[Thomas Gleixner]

Add the necessary exit functions so it can be built as a module.

Signed-off-by: Thomas Gleixner <t...@linutronix.de>
---
 arch/x86/Kconfig.perf                       |   13 +++++++++++++
 arch/x86/kernel/cpu/Makefile                |    4 +++-
 arch/x86/kernel/cpu/perf_event_intel_rapl.c |   22 +++++++++++++++++++---
 3 files changed, 35 insertions(+), 4 deletions(-)

--- a/arch/x86/Kconfig.perf
+++ b/arch/x86/Kconfig.perf
@@ -13,4 +13,17 @@ config PERF_EVENTS_INTEL_UNCORE
 
          If unsure say y.
 
+config PERF_EVENTS_INTEL_RAPL
+       tristate "Intel rapl performance events"
+       depends on PERF_EVENTS && CPU_SUP_INTEL && PCI
+       default y
+       ---help---
+         Include support for Intel rapl performance events for power
+         monitoring on modern processors.
+
+         Note: Selecting 'm' might break existing setups as the drivers
+         lack the autoprobe/load magic. If you need them select: y.
+
+         If unsure say y.
+
 endmenu
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -39,10 +39,12 @@ obj-$(CONFIG_CPU_SUP_AMD)           += perf_event
 endif
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_p6.o perf_event_knc.o 
perf_event_p4.o
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_lbr.o 
perf_event_intel_ds.o perf_event_intel.o
-obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_rapl.o 
perf_event_intel_cqm.o
+obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_cqm.o
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_pt.o 
perf_event_intel_bts.o
 obj-$(CONFIG_CPU_SUP_INTEL)            += perf_event_intel_cstate.o
 
+obj-$(CONFIG_PERF_EVENTS_INTEL_RAPL)   += perf_event_intel_rapl.o
+
 obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += perf_event_intel_uncores.o
 perf_event_intel_uncores-objs          := perf_event_intel_uncore.o \
                                           perf_event_intel_uncore_snb.o \
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -53,6 +53,8 @@
 #include <asm/cpu_device_id.h>
 #include "perf_event.h"
 
+MODULE_LICENSE("GPL");
+
 /*
  * RAPL energy status counters
  */
@@ -592,6 +594,10 @@ static int rapl_cpu_notifier(struct noti
        return NOTIFY_OK;
 }
 
+static struct notifier_block rapl_cpu_nb = {
+       .notifier_call  = rapl_cpu_notifier,
+};
+
 static __init void rapl_hsw_server_quirk(void)
 {
        /*
@@ -666,7 +672,7 @@ static int __init rapl_prepare_cpus(void
        return 0;
 }
 
-static void __init cleanup_rapl_pmus(void)
+static void cleanup_rapl_pmus(void)
 {
        int i;
 
@@ -759,7 +765,7 @@ static int __init rapl_pmu_init(void)
        if (ret)
                goto out;
 
-       __perf_cpu_notifier(rapl_cpu_notifier);
+       __register_cpu_notifier(&rapl_cpu_nb);
        cpu_notifier_register_done();
        rapl_advertise();
        return 0;
@@ -770,4 +776,14 @@ static int __init rapl_pmu_init(void)
        cpu_notifier_register_done();
        return ret;
 }
-device_initcall(rapl_pmu_init);
+module_init(rapl_pmu_init);
+
+static void __exit intel_rapl_exit(void)
+{
+       cpu_notifier_register_done();
+       __unregister_cpu_notifier(&rapl_cpu_nb);
+       perf_pmu_unregister(&rapl_pmus->pmu);
+       cleanup_rapl_pmus();
+       cpu_notifier_register_done();
+}
+module_exit(intel_rapl_exit);