Since 'tr->ip' is already a 'ftrace_location()'-ed IP in bpf_trampoline_lookup(), it is unnecessary to call ftrace_location() again in register/unregister/modify_fentry_multi().
No functional changes intended. Signed-off-by: Leon Hwang <[email protected]> --- kernel/bpf/trampoline.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c index 17f2a8133f61..21d460866dfe 100644 --- a/kernel/bpf/trampoline.c +++ b/kernel/bpf/trampoline.c @@ -1629,8 +1629,8 @@ static void ftrace_hash_add(struct ftrace_hash *hash, struct ftrace_func_entry * static int register_fentry_multi(struct bpf_trampoline *tr, struct bpf_tramp_image *im, void *ptr) { unsigned long addr = (unsigned long) im->image; - unsigned long ip = ftrace_location(tr->ip); struct bpf_tracing_multi_data *data = ptr; + unsigned long ip = tr->ip; /* * Different BTF ids get different trampolines, but they can still @@ -1651,13 +1651,12 @@ static int register_fentry_multi(struct bpf_trampoline *tr, struct bpf_tramp_ima static int unregister_fentry_multi(struct bpf_trampoline *tr, u32 orig_flags, void *ptr) { unsigned long addr = (unsigned long) tr->cur_image->image; - unsigned long ip = ftrace_location(tr->ip); struct bpf_tracing_multi_data *data = ptr; if (bpf_trampoline_use_jmp(tr->flags)) addr = ftrace_jmp_set(addr); - ftrace_hash_add(data->unreg, data->entry, ip, addr); + ftrace_hash_add(data->unreg, data->entry, tr->ip, addr); tr->cur_image = NULL; return 0; } @@ -1666,13 +1665,12 @@ static int modify_fentry_multi(struct bpf_trampoline *tr, u32 orig_flags, struct bool lock_direct_mutex, void *ptr) { unsigned long addr = (unsigned long) im->image; - unsigned long ip = ftrace_location(tr->ip); struct bpf_tracing_multi_data *data = ptr; if (bpf_trampoline_use_jmp(tr->flags)) addr = ftrace_jmp_set(addr); - ftrace_hash_add(data->modify, data->entry, ip, addr); + ftrace_hash_add(data->modify, data->entry, tr->ip, addr); tr->cur_image = im; return 0; } -- 2.55.0
