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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-10-12 18:40:02 -0400
committerDavid S. Miller <davem@davemloft.net>2017-10-16 21:10:20 +0100
commit9185a610f8f7f1b4e4d28c9de27d1969cf58e0f1 (patch)
treee3add3c3a46dcfd40605ecee36193a94b430a209 /kernel
parent0da4af00b2ed3dbe46788623a696c4169447eadc (diff)
downloadlinux-9185a610f8f7f1b4e4d28c9de27d1969cf58e0f1.tar.bz2
tracing: bpf: Hide bpf trace events when they are not used
All the trace events defined in include/trace/events/bpf.h are only used when CONFIG_BPF_SYSCALL is defined. But this file gets included by include/linux/bpf_trace.h which is included by the networking code with CREATE_TRACE_POINTS defined. If a trace event is created but not used it still has data structures and functions created for its use, even though nothing is using them. To not waste space, do not define the BPF trace events in bpf.h unless CONFIG_BPF_SYSCALL is defined. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/bpf/core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 248961af2421..8e7c8bf2b687 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1580,5 +1580,8 @@ int __weak skb_copy_bits(const struct sk_buff *skb, int offset, void *to,
EXPORT_TRACEPOINT_SYMBOL_GPL(xdp_exception);
+/* These are only used within the BPF_SYSCALL code */
+#ifdef CONFIG_BPF_SYSCALL
EXPORT_TRACEPOINT_SYMBOL_GPL(bpf_prog_get_type);
EXPORT_TRACEPOINT_SYMBOL_GPL(bpf_prog_put_rcu);
+#endif