[PATCH] selftest/mm: Do not use hint for riscv mmap

From: Chunyan Zhang
Date: Thu Sep 12 2024 - 06:00:50 EST


When the virtual address range selftest is run on RISC-V platforms,
it is observed that using the hint address when calling mmap cannot
get the address in the range of that validate_addr() checks, also
that will cause '/proc/self/maps' have gaps larger than MAP_CHUNK_SIZE.

Signed-off-by: Chunyan Zhang <zhangchunyan@xxxxxxxxxxx>
---
tools/testing/selftests/mm/virtual_address_range.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/tools/testing/selftests/mm/virtual_address_range.c b/tools/testing/selftests/mm/virtual_address_range.c
index 4e4c1e311247..25f3eb304999 100644
--- a/tools/testing/selftests/mm/virtual_address_range.c
+++ b/tools/testing/selftests/mm/virtual_address_range.c
@@ -64,6 +64,14 @@
#define NR_CHUNKS_HIGH NR_CHUNKS_384TB
#endif

+#if defined(__riscv) && (__riscv_xlen == 64)
+static char *hind_addr(void)
+{
+ return NULL;
+}
+
+static void validate_addr(char *ptr, int high_addr) { }
+#else
static char *hind_addr(void)
{
int bits = HIGH_ADDR_SHIFT + rand() % (63 - HIGH_ADDR_SHIFT);
@@ -81,6 +89,7 @@ static void validate_addr(char *ptr, int high_addr)
if (addr > HIGH_ADDR_MARK)
ksft_exit_fail_msg("Bad address %lx\n", addr);
}
+#endif

static int validate_lower_address_hint(void)
{
--
2.34.1