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[bpf-next] libbpf: fix printf formatter for ptrdiff_t argument

Message ID 20190416174059.1194824-1-andrii.nakryiko@gmail.com
State Changes Requested
Delegated to: BPF Maintainers
Headers show
Series [bpf-next] libbpf: fix printf formatter for ptrdiff_t argument | expand

Commit Message

Andrii Nakryiko April 16, 2019, 5:40 p.m. UTC 
From: Andrii Nakryiko <andriin@fb.com>

Using %ld for printing out value of ptrdiff_t type is not portable
between 32-bit and 64-bit archs. This is causing compilation errors for
libbpf on 32-bit platform. Proper formatter is %td, which is used in
this patch.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e5b77ad97795..d817bf20f3d6 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -817,7 +817,7 @@  bpf_object__init_internal_map(struct bpf_object *obj, struct bpf_map *map,
 		memcpy(*data_buff, data->d_buf, data->d_size);
 	}
 
-	pr_debug("map %ld is \"%s\"\n", map - obj->maps, map->name);
+	pr_debug("map %td is \"%s\"\n", map - obj->maps, map->name);
 	return 0;
 }