From c024378d20dfc1409bd702abc0a7917aee4d3f04 Mon Sep 17 00:00:00 2001
From: Namjae Jeon <namjae.jeon@samsung.com>
Date: Wed, 24 Mar 2021 12:10:48 +0900
Subject: [PATCH] exfat: block: use an on-stack bio in blkdev_issue_flush

There is no point in allocating memory for a synchronous flush.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
---
 file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/file.c b/file.c
index 1a4ffb0358b3..c12d55f58aa5 100644
--- a/file.c
+++ b/file.c
@@ -473,11 +473,15 @@ int exfat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 	if (err)
 		return err;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
+	return blkdev_issue_flush(inode->i_sb->s_bdev);
+#else
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
 	return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
 #else
 	return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 #endif
+#endif
 }
 
 const struct file_operations exfat_file_operations = {