sysfs: Add crash_notes_size to export percpu note size

[deliverable/linux.git] / drivers / base / cpu.c

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index fb10728f63721565d282e2298f2bf14641fb8f1e..a55b5909176f4e82792de7acd50cccd1f08b82ff 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -132,6 +132,17 @@ static ssize_t show_crash_notes(struct device *dev, struct device_attribute *att
        return rc;
 }
 static DEVICE_ATTR(crash_notes, 0400, show_crash_notes, NULL);
+
+static ssize_t show_crash_notes_size(struct device *dev,
+                                    struct device_attribute *attr,
+                                    char *buf)
+{
+       ssize_t rc;
+
+       rc = sprintf(buf, "%lu\n", sizeof(note_buf_t));
+       return rc;
+}
+static DEVICE_ATTR(crash_notes_size, 0400, show_crash_notes_size, NULL);
 #endif
 
 /*
@@ -259,6 +270,9 @@ int __cpuinit register_cpu(struct cpu *cpu, int num)
 #ifdef CONFIG_KEXEC
        if (!error)
                error = device_create_file(&cpu->dev, &dev_attr_crash_notes);
+       if (!error)
+               error = device_create_file(&cpu->dev,
+                                          &dev_attr_crash_notes_size);
 #endif
        return error;
 }