[LTP] [PATCH 1/2] pkey01: print more info when write buff fail

[Li Wang]

We got sporadically failed on POWER9 but couldn't reproduce the problem
manually. Here add printf to show info to see if the PKEY_DISABLE_WRITE
takes effect on buffers.

  pkey01.c:149: TINFO: Set PKEY_DISABLE_WRITE on (MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB) buffer
  pkey01.c:174: TFAIL: Child: exited with 0
  pkey01.c:176: TINFO: Remove PKEY_DISABLE_WRITE from the buffer

Signed-off-by: Li Wang <liwang@redhat.com>
---
 testcases/kernel/syscalls/pkeys/pkey01.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testcases/kernel/syscalls/pkeys/pkey01.c b/testcases/kernel/syscalls/pkeys/pkey01.c
index 04f50924c..1a9194e1a 100644
--- a/testcases/kernel/syscalls/pkeys/pkey01.c
+++ b/testcases/kernel/syscalls/pkeys/pkey01.c
@@ -161,6 +161,8 @@ static void pkey_test(struct tcase *tc, struct mmap_param *mpa)
 		break;
 		case PKEY_DISABLE_WRITE:
 			*buffer = 'a';
+			tst_res(TFAIL | TERRNO,
+				"Write buffer success, buffer[0] = %d", *buffer);
 		break;
 		}
 		exit(0);
@@ -183,6 +185,7 @@ static void pkey_test(struct tcase *tc, struct mmap_param *mpa)
 	break;
 	case PROT_WRITE:
 		*buffer = 'a';
+		tst_res(TPASS, "Write buffer success, buffer[0] = %d", *buffer);
 	break;
 	case PROT_READ | PROT_WRITE:
 	case PROT_READ | PROT_WRITE | PROT_EXEC:
-- 
2.31.1