This patch series tries to optimize the bpf_kporbe_multi_link_attach in bpf_trace.c Firstly, there is only one 'error' tag to handle error code. But in one 'error' tag, there are three 'free' functions which is not efficient. So I split this one tag to three tags to make it clear. Secondly, I simplify double 'if' statements to one statement. Finally, coccicheck reports an opportunity for vmemdup_user. So I use vmemdup_user to make code cleaner. Wan Jiabing (3): bpf: use 'error_xxx' tags in bpf_kprobe_multi_link_attach bpf: simplify if-if to if in bpf_kprobe_multi_link_attach bpf: use vmemdup_user instead of kvmalloc and copy_from_user kernel/trace/bpf_trace.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) -- 2.35.1
