Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / proc / softirqs.c

diff --git a/kernel/fs/proc/softirqs.c b/kernel/fs/proc/softirqs.c
new file mode 100644 (file)
index 0000000..ad8a77f
--- /dev/null
+++ b/kernel/fs/proc/softirqs.c
@@ -0,0 +1,44 @@
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/*
+ * /proc/softirqs  ... display the number of softirqs
+ */
+static int show_softirqs(struct seq_file *p, void *v)
+{
+       int i, j;
+
+       seq_puts(p, "                    ");
+       for_each_possible_cpu(i)
+               seq_printf(p, "CPU%-8d", i);
+       seq_putc(p, '\n');
+
+       for (i = 0; i < NR_SOFTIRQS; i++) {
+               seq_printf(p, "%12s:", softirq_to_name[i]);
+               for_each_possible_cpu(j)
+                       seq_printf(p, " %10u", kstat_softirqs_cpu(i, j));
+               seq_putc(p, '\n');
+       }
+       return 0;
+}
+
+static int softirqs_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, show_softirqs, NULL);
+}
+
+static const struct file_operations proc_softirqs_operations = {
+       .open           = softirqs_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
+static int __init proc_softirqs_init(void)
+{
+       proc_create("softirqs", 0, NULL, &proc_softirqs_operations);
+       return 0;
+}
+fs_initcall(proc_softirqs_init);