f2fs: Clean up the loop outside of f2fs_invalidate_blocks()

Now f2fs_invalidate_blocks() supports a continuous range of addresses,
so the for loop can be omitted.

Signed-off-by: Yi Sun <yi.sun@unisoc.com>
Signed-off-by: Zhiguo Niu <zhiguo.niu@unisoc.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Author: Yi Sun

fs/f2fs/file.c

@@ -768,10 +768,8 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
 	if (IS_DEVICE_ALIASING(inode)) {
 		struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];
 		struct extent_info ei = et->largest;
-		unsigned int i;
 
-		for (i = 0; i < ei.len; i++)
-			f2fs_invalidate_blocks(sbi, ei.blk + i, 1);
+		f2fs_invalidate_blocks(sbi, ei.blk, ei.len);
 
 		dec_valid_block_count(sbi, inode, ei.len);
 		f2fs_update_time(sbi, REQ_TIME);