summaryrefslogtreecommitdiffstats
path: root/kernel/ksysfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/ksysfs.c')
-rw-r--r--kernel/ksysfs.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index e83b26464061..152da4a48867 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -20,7 +20,7 @@
#include <linux/capability.h>
#include <linux/compiler.h>
-#include <linux/rcupdate.h> /* rcu_expedited */
+#include <linux/rcupdate.h> /* rcu_expedited and rcu_normal */
#define KERNEL_ATTR_RO(_name) \
static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
@@ -144,11 +144,12 @@ static ssize_t fscaps_show(struct kobject *kobj,
}
KERNEL_ATTR_RO(fscaps);
+#ifndef CONFIG_TINY_RCU
int rcu_expedited;
static ssize_t rcu_expedited_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", rcu_expedited);
+ return sprintf(buf, "%d\n", READ_ONCE(rcu_expedited));
}
static ssize_t rcu_expedited_store(struct kobject *kobj,
struct kobj_attribute *attr,
@@ -161,6 +162,24 @@ static ssize_t rcu_expedited_store(struct kobject *kobj,
}
KERNEL_ATTR_RW(rcu_expedited);
+int rcu_normal;
+static ssize_t rcu_normal_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", READ_ONCE(rcu_normal));
+}
+static ssize_t rcu_normal_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ if (kstrtoint(buf, 0, &rcu_normal))
+ return -EINVAL;
+
+ return count;
+}
+KERNEL_ATTR_RW(rcu_normal);
+#endif /* #ifndef CONFIG_TINY_RCU */
+
/*
* Make /sys/kernel/notes give the raw contents of our kernel .notes section.
*/
@@ -202,7 +221,10 @@ static struct attribute * kernel_attrs[] = {
&kexec_crash_size_attr.attr,
&vmcoreinfo_attr.attr,
#endif
+#ifndef CONFIG_TINY_RCU
&rcu_expedited_attr.attr,
+ &rcu_normal_attr.attr,
+#endif
NULL
};