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: 79ff13e99169 ("libbpf: Add support for bpf_arena.")
Reported-by: Ryan Eatmon <reatmon@ti.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Message-ID: <20240319215143.1279312-1-andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 36e26f4..1e3e697 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -5352,8 +5352,8 @@
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) {
