bpf: fix build without bpf_syscall

wrap bpf_stats_enabled sysctl with #ifdef

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 492ecee892c2 ("bpf: enable program stats")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 86e0771352f2452d68b87ef27ac77a7846cf152d..7578e21a711b45c8ecddc86ae280c7965e177cac 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -224,9 +224,11 @@ static int proc_dostring_coredump(struct ctl_table *table, int write,
 #endif
 static int proc_dopipe_max_size(struct ctl_table *table, int write,
                void __user *buffer, size_t *lenp, loff_t *ppos);
+#ifdef CONFIG_BPF_SYSCALL
 static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write,
                                          void __user *buffer, size_t *lenp,
                                          loff_t *ppos);
+#endif
 
 #ifdef CONFIG_MAGIC_SYSRQ
 /* Note: sysrq code uses its own private copy */
@@ -1232,7 +1234,6 @@ static struct ctl_table kern_table[] = {
                .extra1         = &one,
                .extra2         = &one,
        },
-#endif
        {
                .procname       = "bpf_stats_enabled",
                .data           = &sysctl_bpf_stats_enabled,
@@ -1242,6 +1243,7 @@ static struct ctl_table kern_table[] = {
                .extra1         = &zero,
                .extra2         = &one,
        },
+#endif
 #if defined(CONFIG_TREE_RCU) || defined(CONFIG_PREEMPT_RCU)
        {
                .procname       = "panic_on_rcu_stall",
@@ -3272,6 +3274,7 @@ int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
 
 #endif /* CONFIG_PROC_SYSCTL */
 
+#ifdef CONFIG_BPF_SYSCALL
 static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write,
                                          void __user *buffer, size_t *lenp,
                                          loff_t *ppos)
@@ -3293,7 +3296,7 @@ static int proc_dointvec_minmax_bpf_stats(struct ctl_table *table, int write,
        }
        return ret;
 }
-
+#endif
 /*
  * No sense putting this after each symbol definition, twice,
  * exception granted :-)