[PATCH bpf-next 03/13] bpf: Drop unnecessary ftrace_location() in update_fentry_multi()
From: Leon Hwang <hidden>
Date: 2026-08-09 15:02:12
Also in:
bpf, linux-kselftest, lkml
Subsystem:
bpf [core], bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Since 'tr->ip' is already a 'ftrace_location()'-ed IP in bpf_trampoline_lookup(), it is unnecessary to call ftrace_location() again in update_fentry_multi(). Signed-off-by: Leon Hwang <redacted> --- kernel/bpf/trampoline.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c
index 6e1898e1b200..eddd259d3776 100644
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c@@ -1573,12 +1573,11 @@ static int update_fentry_multi(struct bpf_trampoline *tr, u32 orig_flags, struct bpf_tracing_multi_data *data) { unsigned long addr = (unsigned long)(im ? im->image : tr->cur_image->image); - unsigned long ip = ftrace_location(tr->ip); if (bpf_trampoline_use_jmp(tr->flags)) addr = ftrace_jmp_set(addr); - ftrace_hash_add(hash, data->entry, ip, addr); + ftrace_hash_add(hash, data->entry, tr->ip, addr); tr->cur_image = im; return 0; }
--
2.55.0