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Commit eeafb786 authored by Olav Haugan's avatar Olav Haugan Committed by Pavankumar Kondeti
Browse files

driver-core: cpu: Make isolate node read-only 



We no longer support isolating a core using the isolate node. Remove
write-access to this node.

Change-Id: Ib51cf12066819ad295ce57f6ae8edf52b0a4e558
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
parent 1447fbb9

drivers/base/cpu.c

+3 −27
Original line number Diff line number Diff line
@@ -182,7 +182,7 @@ static struct attribute_group crash_note_cpu_attr_group = { 


#ifdef CONFIG_HOTPLUG_CPU



static ssize_t show_cpu_isolated(struct device *dev,

static ssize_t isolate_show(struct device *dev,

			    struct device_attribute *attr, char *buf)

{

	struct cpu *cpu = container_of(dev, struct cpu, dev);
@@ -195,31 +195,7 @@ static ssize_t show_cpu_isolated(struct device *dev, 
	return rc;

}



static ssize_t __ref store_cpu_isolated(struct device *dev,

				struct device_attribute *attr,

				const char *buf, size_t count)

{

	struct cpu *cpu = container_of(dev, struct cpu, dev);

	int err;

	int cpuid = cpu->dev.id;

	unsigned int isolated;



	err = kstrtouint(strstrip((char *)buf), 0, &isolated);

	if (err)

		return err;



	if (isolated > 1)

		return -EINVAL;



	if (isolated)

		sched_isolate_cpu(cpuid);

	else

		sched_unisolate_cpu(cpuid);



	return count;

}



static DEVICE_ATTR(isolate, 0644, show_cpu_isolated, store_cpu_isolated);

static DEVICE_ATTR_RO(isolate);



static struct attribute *cpu_isolated_attrs[] = {

	&dev_attr_isolate.attr,