diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 53be251585603067c515f14bef2109b4ca34b64a..9157fcf887bc0c2b782a97396f824f8055caf8e7 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -124,7 +124,7 @@ static int reserve_blocks(struct super_block *sb, int count)
 			return 0;
 	}
 
-	percpu_counter_add(&sbi->s_freeblocks_counter, -count);
+	percpu_counter_sub(&sbi->s_freeblocks_counter, count);
 	sb->s_dirt = 1;
 	return count;
 }
diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index df575673e02d9718d13aa49e74040b3c0affc17e..d3758ee9cb5bde3e8c6ee8c1b154efa48e3e9443 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -1633,7 +1633,7 @@ ext3_fsblk_t ext3_new_blocks(handle_t *handle, struct inode *inode,
 	gdp->bg_free_blocks_count =
 			cpu_to_le16(le16_to_cpu(gdp->bg_free_blocks_count)-num);
 	spin_unlock(sb_bgl_lock(sbi, group_no));
-	percpu_counter_add(&sbi->s_freeblocks_counter, -num);
+	percpu_counter_sub(&sbi->s_freeblocks_counter, num);
 
 	BUFFER_TRACE(gdp_bh, "journal_dirty_metadata for group descriptor");
 	err = ext3_journal_dirty_metadata(handle, gdp_bh);
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index a141456cd4919ec17cb81ff625b452f28ea10357..8d59eec2e82b55e98cd3e82845378fb34bd5ddba 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1647,7 +1647,7 @@ ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
 	gdp->bg_free_blocks_count =
 			cpu_to_le16(le16_to_cpu(gdp->bg_free_blocks_count)-num);
 	spin_unlock(sb_bgl_lock(sbi, group_no));
-	percpu_counter_add(&sbi->s_freeblocks_counter, -num);
+	percpu_counter_sub(&sbi->s_freeblocks_counter, num);
 
 	BUFFER_TRACE(gdp_bh, "journal_dirty_metadata for group descriptor");
 	err = ext4_journal_dirty_metadata(handle, gdp_bh);
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index b84fc8667de86cb5299d4f1466ee30aaf7ed9a6c..438a170187ec6026342f8d67173d22018b6f3f03 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -105,4 +105,9 @@ static inline void percpu_counter_dec(struct percpu_counter *fbc)
 	percpu_counter_add(fbc, -1);
 }
 
+static inline void percpu_counter_sub(struct percpu_counter *fbc, s64 amount)
+{
+	percpu_counter_add(fbc, -amount);
+}
+
 #endif /* _LINUX_PERCPU_COUNTER_H */