[LTP] [PATCH v2] zram03: drop obsolete sysfs interfaces

[Yang Shi]

Due to upstream linux commit c87d1655c29500b459fb135258a93f8309ada9c7
("zram: remove obsolete sysfs attrs"), some sysfs interfaces are not
available anymore.

Check kernel version, and remove dumping them on >= 4.10 kernel to avoid
test case failure.

Suggested-by: Li Wang <liwang@redhat.com>
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
---
v1 --> v2:
Check kernel version to dump proper stats per Li Wang's suggestion

 testcases/kernel/device-drivers/zram/zram03.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/testcases/kernel/device-drivers/zram/zram03.c b/testcases/kernel/device-drivers/zram/zram03.c
index 3f7ab4e..58d88bc 100644
--- a/testcases/kernel/device-drivers/zram/zram03.c
+++ b/testcases/kernel/device-drivers/zram/zram03.c
@@ -185,11 +185,15 @@ static void print(char *string)
 static void dump_info(void)
 {
 	print("initstate");
-	print("compr_data_size");
-	print("orig_data_size");
 	print("disksize");
-	print("mem_used_total");
-	print("num_reads");
-	print("num_writes");
-	print("zero_pages");
+
+	if ((tst_kvercmp(4, 10, 0)) < 0) {
+		/* The below stats are not available on 4.10 or newer kernel */
+		print("compr_data_size");
+		print("orig_data_size");
+		print("mem_used_total");
+		print("num_reads");
+		print("num_writes");
+		print("zero_pages");
+	}
 }
-- 
1.8.3.1