Static key is used to enable/disable cgroup-bpf related code paths at run time.
Though it's not defined when cgroup-bpf is disabled at compile time, i.e. CONFIG_CGROUP_BPF=n, and if some code wants to use it, it has to do this: #ifdef CONFIG_CGROUP_BPF if (cgroup_bpf_enabled) { /* ... some work ... */ } #endif This code can be simplified by setting cgroup_bpf_enabled to 0 for CONFIG_CGROUP_BPF=n case: if (cgroup_bpf_enabled) { /* ... some work ... */ } And it aligns well with existing BPF_CGROUP_RUN_PROG_* macros that defined for both states of CONFIG_CGROUP_BPF. Signed-off-by: Andrey Ignatov <r...@fb.com> --- include/linux/bpf-cgroup.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h index 30d15e6..de8e89a 100644 --- a/include/linux/bpf-cgroup.h +++ b/include/linux/bpf-cgroup.h @@ -185,6 +185,7 @@ struct cgroup_bpf {}; static inline void cgroup_bpf_put(struct cgroup *cgrp) {} static inline int cgroup_bpf_inherit(struct cgroup *cgrp) { return 0; } +#define cgroup_bpf_enabled (0) #define BPF_CGROUP_PRE_CONNECT_ENABLED(sk) (0) #define BPF_CGROUP_RUN_PROG_INET_INGRESS(sk,skb) ({ 0; }) #define BPF_CGROUP_RUN_PROG_INET_EGRESS(sk,skb) ({ 0; }) -- 2.9.5