libbpf: fix u64-to-pointer cast on 32-bit arches

It's been reported that (void *)map->map_extra is causing compilation warnings on 32-bit architectures. It's easy enough to fix this by casting to long first. Fixes: 79ff13e ("libbpf: Add support for bpf_arena.") Reported-by: Ryan Eatmon <[email protected]> Signed-off-by: Andrii Nakryiko <[email protected]> Message-ID: <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
raspberrypi · Mar 20, 2024 · 5ab8cb8 · 5ab8cb8
1 parent 7ded842
commit 5ab8cb8
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
@@ -5352,8 +5352,8 @@ bpf_object__create_maps(struct bpf_object *obj)
 					goto err_out;
 			}
 			if (map->def.type == BPF_MAP_TYPE_ARENA) {
-				map->mmaped = mmap((void *)map->map_extra, bpf_map_mmap_sz(map),
-						   PROT_READ | PROT_WRITE,
+				map->mmaped = mmap((void *)(long)map->map_extra,
+						   bpf_map_mmap_sz(map), PROT_READ | PROT_WRITE,
 						   map->map_extra ? MAP_SHARED | MAP_FIXED : MAP_SHARED,
 						   map->fd, 0);
 				if (map->mmaped == MAP_FAILED) {