1 files changed, 2 insertions, 3 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d6e10d60f8ad..8eecfcce56ed 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1335,8 +1335,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
                 inode->i_mapping->writeback_index = i;
 
         while (i <= last_index && defrag_count < max_to_defrag &&
-               (i < (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
-                PAGE_CACHE_SHIFT)) {
+               (i < DIV_ROUND_UP(i_size_read(inode), PAGE_CACHE_SIZE))) {
                 /*
                  * make sure we stop running if someone unmounts
                  * the FS
@@ -1359,7 +1358,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
                          * the should_defrag function tells us how much to skip
                          * bump our counter by the suggested amount
                          */
-                        next = (skip + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+                        next = DIV_ROUND_UP(skip, PAGE_CACHE_SIZE);
                         i = max(i + 1, next);
                         continue;
                 }