From: Alexei Starovoitov <ast@xxxxxxxxxx>
[ Upstream commit 608e99f7869e3a6e028c7cba14a896c7797e8746 ]
llvm 19 fails to compile arena self test:
CLNG-BPF [test_progs] verifier_arena_large.bpf.o
progs/verifier_arena_large.c:90:24: error: unsupported signed division, please convert to unsigned div/mod.
90 | pg_idx = (pg - base) / PAGE_SIZE;
Though llvm <= 18 and llvm >= 20 don't have this issue,
fix the test to avoid the build error.
Reported-by: Jiri Olsa <olsajiri@xxxxxxxxx>
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
[Yifei: This fix is necessary to make the selfttest build with llvm19 if
commit e58358afa84e ("selftests/bpf: Add a test for arena range tree algorithm") is backported]
Signed-off-by: Yifei Liu <yifei.l.liu@xxxxxxxxxx>
---
tools/testing/selftests/bpf/progs/verifier_arena_large.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/progs/verifier_arena_large.c b/tools/testing/selftests/bpf/progs/verifier_arena_large.c
index f318675814c6..758b09a5eb88 100644
--- a/tools/testing/selftests/bpf/progs/verifier_arena_large.c
+++ b/tools/testing/selftests/bpf/progs/verifier_arena_large.c
@@ -87,7 +87,7 @@ __noinline int alloc_pages(int page_cnt, int pages_atonce, bool first_pass,
NUMA_NO_NODE, 0);
if (!pg)
return step;
- pg_idx = (pg - base) / PAGE_SIZE;
+ pg_idx = (unsigned long) (pg - base) / PAGE_SIZE;
if (first_pass) {
/* Pages must be allocated sequentially */
if (pg_idx != i)
--
2.46.0
