1 files changed, 1 insertions, 2 deletions

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 61a604c12a96..4dade515b086 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1975,8 +1975,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
         if (unlikely(error))
                 goto bad_swap;
 
-        swapfilepages = i_size_read(inode) >> PAGE_SHIFT;
-
         /*
          * Read the swap header.
          */
@@ -2045,6 +2043,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
         error = -EINVAL;
         if (!maxpages)
                 goto bad_swap;
+        swapfilepages = i_size_read(inode) >> PAGE_SHIFT;
         if (swapfilepages && maxpages > swapfilepages) {
                 printk(KERN_WARNING
                        "Swap area shorter than signature indicates\n");