[PATCH 0/3] bpf: optimize the bpf_kprobe_multi_link_attach function
From: Wan Jiabing
Date: Thu May 12 2022 - 10:17:42 EST
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