add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/btrfs/super.c
..
..
@@ -1692,8 +1692,6 @@
1692
1692
 	} else {
1693
1693
 		snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
1694
1694
 		btrfs_sb(s)->bdev_holder = fs_type;
1695
-		if (!strstr(crc32c_impl(), "generic"))
1696
-			set_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags);
1697
1695
 		error = btrfs_fill_super(s, fs_devices, data);
1698
1696
 	}
1699
1697
 	if (!error)
..
..
@@ -2269,7 +2267,7 @@
2269
2267
 	 * calculated f_bavail.
2270
2268
 	 */
2271
2269
 	if (!mixed && block_rsv->space_info->full &&
2272
-	    total_free_meta - thresh < block_rsv->size)
2270
+	    (total_free_meta < thresh || total_free_meta - thresh < block_rsv->size))
2273
2271
 		buf->f_bavail = 0;
2274
2272
 
2275
2273
 	buf->f_type = BTRFS_SUPER_MAGIC;