ext4: cleanup in ext4_discard_allocated_blocks()

remove 'len' variable in ext4_discard_allocated_blocks() because it is
useless.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 2 insertions, 6 deletions

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 45cb31e8dd27..e4b4ac1ec684 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3073,13 +3073,9 @@ static void ext4_mb_collect_stats(struct ext4_allocation_context *ac)
 static void ext4_discard_allocated_blocks(struct ext4_allocation_context *ac)
 {
         struct ext4_prealloc_space *pa = ac->ac_pa;
-        int len;
-
-        if (pa && pa->pa_type == MB_INODE_PA) {
-                len = ac->ac_b_ex.fe_len;
-                pa->pa_free += len;
-        }
 
+        if (pa && pa->pa_type == MB_INODE_PA)
+                pa->pa_free += ac->ac_b_ex.fe_len;
 }
 
 /*