+KERNEL_ATTR_RO(kexec_crash_loaded);
+
+static ssize_t kexec_crash_size_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%zu\n", crash_get_memory_size());
+}
+static ssize_t kexec_crash_size_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long cnt;
+ int ret;
+
+ if (strict_strtoul(buf, 0, &cnt))
+ return -EINVAL;
+
+ ret = crash_shrink_memory(cnt);
+ return ret < 0 ? ret : count;
+}
+KERNEL_ATTR_RW(kexec_crash_size);
+
+static ssize_t vmcoreinfo_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%lx %x\n",
+ paddr_vmcoreinfo_note(),
+ (unsigned int)vmcoreinfo_max_size);
+}
+KERNEL_ATTR_RO(vmcoreinfo);
+
+#endif /* CONFIG_KEXEC */
+
+/*
+ * Make /sys/kernel/notes give the raw contents of our kernel .notes section.
+ */
+extern const void __start_notes __attribute__((weak));
+extern const void __stop_notes __attribute__((weak));
+#define notes_size (&__stop_notes - &__start_notes)
+
+static ssize_t notes_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ memcpy(buf, &__start_notes + off, count);
+ return count;
+}
+
+static struct bin_attribute notes_attr = {
+ .attr = {
+ .name = "notes",
+ .mode = S_IRUGO,
+ },
+ .read = ¬es_read,
+};