[PATCH] selftests/mm: virtual_address_range: Switch to ksft_exit_fail_msg

From: Dev Jain
Date: Thu Mar 14 2024 - 08:23:50 EST


mmap() must not succeed in validate_lower_address_hint(), for if it does, it
is a bug in mmap() itself. Reflect this behaviour with ksft_exit_fail_msg().
While at it, do some formatting changes.

Signed-off-by: Dev Jain <dev.jain@xxxxxxx>
---
tools/testing/selftests/mm/virtual_address_range.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/mm/virtual_address_range.c b/tools/testing/selftests/mm/virtual_address_range.c
index 7bcf8d48256a..426ddfc345fb 100644
--- a/tools/testing/selftests/mm/virtual_address_range.c
+++ b/tools/testing/selftests/mm/virtual_address_range.c
@@ -85,7 +85,7 @@ static int validate_lower_address_hint(void)
char *ptr;

ptr = mmap((void *) (1UL << 45), MAP_CHUNK_SIZE, PROT_READ |
- PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

if (ptr == MAP_FAILED)
return 0;
@@ -105,13 +105,11 @@ int main(int argc, char *argv[])

for (i = 0; i < NR_CHUNKS_LOW; i++) {
ptr[i] = mmap(NULL, MAP_CHUNK_SIZE, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

if (ptr[i] == MAP_FAILED) {
- if (validate_lower_address_hint()) {
- ksft_test_result_skip("Memory constraint not fulfilled\n");
- ksft_finished();
- }
+ if (validate_lower_address_hint())
+ ksft_exit_fail_msg("mmap unexpectedly succeeded with hint\n");
break;
}

@@ -127,7 +125,7 @@ int main(int argc, char *argv[])
for (i = 0; i < NR_CHUNKS_HIGH; i++) {
hint = hind_addr();
hptr[i] = mmap(hint, MAP_CHUNK_SIZE, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

if (hptr[i] == MAP_FAILED)
break;
--
2.34.1