Merge branch 'writeback-for-2.6.34' into nfs-for-2.6.34

1 files changed, 30 insertions, 0 deletions

diff --git a/include/linux/range.h b/include/linux/range.h
new file mode 100644
index 000000000000..bd184a5db791
--- /dev/null
+++ b/include/linux/range.h
@@ -0,0 +1,30 @@
+#ifndef _LINUX_RANGE_H
+#define _LINUX_RANGE_H
+
+struct range {
+        u64   start;
+        u64   end;
+};
+
+int add_range(struct range *range, int az, int nr_range,
+                u64 start, u64 end);
+
+
+int add_range_with_merge(struct range *range, int az, int nr_range,
+                                u64 start, u64 end);
+
+void subtract_range(struct range *range, int az, u64 start, u64 end);
+
+int clean_sort_range(struct range *range, int az);
+
+void sort_range(struct range *range, int nr_range);
+
+#define MAX_RESOURCE ((resource_size_t)~0)
+static inline resource_size_t cap_resource(u64 val)
+{
+        if (val > MAX_RESOURCE)
+                return MAX_RESOURCE;
+
+        return val;
+}
+#endif