From f8c9b3051ded5a397172aee79271cc46529ca8f2 Mon Sep 17 00:00:00 2001 From: Mykyta Yatsenko Date: Mon, 18 May 2026 08:23:15 -0700 Subject: [PATCH] bpf: Make btf_get_module_btf() and btf_relocate_id() non-static Drop the static qualifier and add prototypes to so the tracing core can look up module BTF and translate ids stored by resolve_btfids (which are local to a module's split BTF) into the runtime ids used by the kernel. Used by the upcoming events///btf_ids tracefs interface. Link: https://patch.msgid.link/20260518-generic_tracepoint-v2-1-b755a5cf67bb@meta.com Signed-off-by: Mykyta Yatsenko Signed-off-by: Steven Rostedt --- include/linux/btf.h | 2 ++ kernel/bpf/btf.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/btf.h b/include/linux/btf.h index c09b7994de4e..8f8d3f7a8929 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -235,6 +235,8 @@ int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec); bool btf_type_is_void(const struct btf_type *t); s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind); s32 bpf_find_btf_id(const char *name, u32 kind, struct btf **btf_p); +struct btf *btf_get_module_btf(const struct module *module); +__u32 btf_relocate_id(const struct btf *btf, __u32 id); const struct btf_type *btf_type_skip_modifiers(const struct btf *btf, u32 id, u32 *res_id); const struct btf_type *btf_type_resolve_ptr(const struct btf *btf, diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index c4673a54c4ba..3dbf33c0799a 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -6467,7 +6467,7 @@ struct btf *btf_parse_vmlinux(void) * split BTF ids will need to be mapped to actual base/split ids for * BTF now that it has been relocated. */ -static __u32 btf_relocate_id(const struct btf *btf, __u32 id) +__u32 btf_relocate_id(const struct btf *btf, __u32 id) { if (!btf->base_btf || !btf->base_id_map) return id; @@ -8630,7 +8630,7 @@ struct module *btf_try_get_module(const struct btf *btf) /* Returns struct btf corresponding to the struct module. * This function can return NULL or ERR_PTR. */ -static struct btf *btf_get_module_btf(const struct module *module) +struct btf *btf_get_module_btf(const struct module *module) { #ifdef CONFIG_DEBUG_INFO_BTF_MODULES struct btf_module *btf_mod, *tmp;