selftests/mm: use selftests framework to print test result

Otherwise the number of tests does not match the reality.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 391e869 ("mm: selftest to verify zero-filled pages are mapped to zeropage")
Signed-off-by: Zi Yan <[email protected]>
Cc: Alexander Zhu <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Usama Arif <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: x-y-z

tools/testing/selftests/mm/split_huge_page_test.c

@@ -108,38 +108,28 @@ static void verify_rss_anon_split_huge_page_all_zeroes(char *one_page, int nr_hp
 	unsigned long rss_anon_before, rss_anon_after;
 	size_t i;
 
-	if (!check_huge_anon(one_page, 4, pmd_pagesize)) {
-		printf("No THP is allocated\n");
-		exit(EXIT_FAILURE);
-	}
+	if (!check_huge_anon(one_page, 4, pmd_pagesize))
+		ksft_exit_fail_msg("No THP is allocated\n");
 
 	rss_anon_before = rss_anon();
-	if (!rss_anon_before) {
-		printf("No RssAnon is allocated before split\n");
-		exit(EXIT_FAILURE);
-	}
+	if (!rss_anon_before)
+		ksft_exit_fail_msg("No RssAnon is allocated before split\n");
 
 	/* split all THPs */
 	write_debugfs(PID_FMT, getpid(), (uint64_t)one_page,
 		      (uint64_t)one_page + len, 0);
 
 	for (i = 0; i < len; i++)
-		if (one_page[i] != (char)0) {
-			printf("%ld byte corrupted\n", i);
-			exit(EXIT_FAILURE);
-		}
+		if (one_page[i] != (char)0)
+			ksft_exit_fail_msg("%ld byte corrupted\n", i);
 
-	if (!check_huge_anon(one_page, 0, pmd_pagesize)) {
-		printf("Still AnonHugePages not split\n");
-		exit(EXIT_FAILURE);
-	}
+	if (!check_huge_anon(one_page, 0, pmd_pagesize))
+		ksft_exit_fail_msg("Still AnonHugePages not split\n");
 
 	rss_anon_after = rss_anon();
-	if (rss_anon_after >= rss_anon_before) {
-		printf("Incorrect RssAnon value. Before: %ld After: %ld\n",
+	if (rss_anon_after >= rss_anon_before)
+		ksft_exit_fail_msg("Incorrect RssAnon value. Before: %ld After: %ld\n",
 		       rss_anon_before, rss_anon_after);
-		exit(EXIT_FAILURE);
-	}
 }
 
 void split_pmd_zero_pages(void)
@@ -150,7 +140,7 @@ void split_pmd_zero_pages(void)
 
 	one_page = allocate_zero_filled_hugepage(len);
 	verify_rss_anon_split_huge_page_all_zeroes(one_page, nr_hpages, len);
-	printf("Split zero filled huge pages successful\n");
+	ksft_test_result_pass("Split zero filled huge pages successful\n");
 	free(one_page);
 }
 
@@ -491,7 +481,7 @@ int main(int argc, char **argv)
 	if (argc > 1)
 		optional_xfs_path = argv[1];
 
-	ksft_set_plan(3+9);
+	ksft_set_plan(4+9);
 
 	pagesize = getpagesize();
 	pageshift = ffs(pagesize) - 1;