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ANDROID: cpu: send KOBJ_ONLINE event when enabling cpus

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In case some sysfs nodes needs to be labeled with a different label than
sysfs then user needs to be notified when a core is brought back online.

Signed-off-by: Thierry Strudel <tstrudel@google.com>
Bug: 29359497
Change-Id: I0395c86e01cd49c348fda8f93087d26f88557c91
This commit is contained in:
Thierry Strudel 2016-06-14 17:46:44 -07:00 committed by Amit Pundir
parent 75ceade08f
commit ded18f7a0f
1 changed files with 7 additions and 0 deletions
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7
kernel/cpu.c
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@ -1228,6 +1228,7 @@ void __weak arch_enable_nonboot_cpus_end(void)
void enable_nonboot_cpus(void) void enable_nonboot_cpus(void)
{ {
int cpu, error; int cpu, error;
struct device *cpu_device;
/* Allow everyone to use the CPU hotplug again */ /* Allow everyone to use the CPU hotplug again */
cpu_maps_update_begin(); cpu_maps_update_begin();
@ -1245,6 +1246,12 @@ void enable_nonboot_cpus(void)
trace_suspend_resume(TPS("CPU_ON"), cpu, false); trace_suspend_resume(TPS("CPU_ON"), cpu, false);
if (!error) { if (!error) {
pr_info("CPU%d is up\n", cpu); pr_info("CPU%d is up\n", cpu);
cpu_device = get_cpu_device(cpu);
if (!cpu_device)
pr_err("%s: failed to get cpu%d device\n",
__func__, cpu);
else
kobject_uevent(&cpu_device->kobj, KOBJ_ONLINE);
continue; continue;
} }
pr_warn("Error taking CPU%d up: %d\n", cpu, error); pr_warn("Error taking CPU%d up: %d\n", cpu, error);