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btf: Refactor the code by calling str_is_empty

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Calling the str_is_empty function to clarify the code and
no functional changes are introduced.

Signed-off-by: Donglin Peng <pengdonglin@xiaomi.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260109130003.3313716-12-dolinux.peng@gmail.com
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Donglin Peng authored and Andrii Nakryiko committed 2026-01-29 14:10:19 -08:00
1 parent ad9c763445
commit 8a090ef1e5
2 files changed
+19 -19
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src/libbpf.c
+2 -2
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@@ -2904,7 +2904,7 @@ static int bpf_object__init_user_btf_map(struct bpf_object *obj,
var_extra = btf_var(var);
map_name = btf__name_by_offset(obj->btf, var->name_off);
if (map_name == NULL || map_name[0] == '\0') {
if (str_is_empty(map_name)) {
pr_warn("map #%d: empty name.\n", var_idx);
return -EINVAL;
}
@@ -4281,7 +4281,7 @@ static int bpf_object__collect_externs(struct bpf_object *obj)
if (!sym_is_extern(sym))
continue;
ext_name = elf_sym_str(obj, sym->st_name);
if (!ext_name || !ext_name[0])
if (str_is_empty(ext_name))
continue;
ext = obj->externs;