1 files changed, 6 insertions, 0 deletions
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index ad1009778d33..5b7a1e201559 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -175,6 +175,12 @@ static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
 #define xfs_sort(a,n,s,fn)	sort(a,n,s,fn,NULL)
 #define xfs_stack_trace()	dump_stack()
 
+static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
+{
+	do_div(x, y);
+	return x * y;
+}
+
 static inline uint64_t roundup_64(uint64_t x, uint32_t y)
 {
 	x += y - 1;