linux-kernel - [PATCH v3 3/6] selftests/clone3: use uint64

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Date:   Wed, 11 Sep 2019 19:02:19 +0100
From:   Eugene Syromiatnikov <esyr@...hat.com>
To:     linux-kernel@...r.kernel.org,
        Christian Brauner <christian@...uner.io>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Cc:     Adrian Reber <areber@...hat.com>
Subject: [PATCH v3 3/6] selftests/clone3: use uint64_t for flags parameter

Flags parameter in both userspace and kernel clone args is 64-bit wide,
there's little reason to have it signed and 32-bit in tests.

* tools/testing/selftests/clone3/clone3.c: Include <inttypes.h> and
<stdint.h>.
(call_clone3): Change flags parameter type from int to uint64_t.
(test_clone3): Change flags parameter type from int to uint64_t; change
the format string that prints it accordingly.

Signed-off-by: Eugene Syromiatnikov <esyr@...hat.com>
---
 tools/testing/selftests/clone3/clone3.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 4837865..264d03a 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -4,8 +4,10 @@
 
 #define _GNU_SOURCE
 #include <errno.h>
+#include <inttypes.h>
 #include <linux/types.h>
 #include <linux/sched.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/syscall.h>
@@ -39,7 +41,7 @@ static pid_t raw_clone(struct clone_args *args, size_t size)
 	return syscall(__NR_clone3, args, size);
 }
 
-static int call_clone3(int flags, size_t size, enum test_mode test_mode)
+static int call_clone3(uint64_t flags, size_t size, enum test_mode test_mode)
 {
 	struct clone_args args = {0};
 	pid_t ppid = -1;
@@ -117,12 +119,13 @@ static int call_clone3(int flags, size_t size, enum test_mode test_mode)
 	return 0;
 }
 
-static int test_clone3(int flags, size_t size, int expected,
+static int test_clone3(uint64_t flags, size_t size, int expected,
 		       enum test_mode test_mode)
 {
 	int ret;
 
-	ksft_print_msg("[%d] Trying clone3() with flags 0x%x (size %d)\n",
+	ksft_print_msg("[%d] Trying clone3() with flags %#" PRIx64 " (size %d)"
+			"\n",
 			getpid(), flags, size);
 	ret = call_clone3(flags, size, test_mode);
 	ksft_print_msg("[%d] clone3() with flags says :%d expected %d\n",
-- 
2.1.4