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Date: Tue, 20 Dec 2016 14:03:49 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Ingo Molnar <mingo@...nel.org> Cc: linux-kernel@...r.kernel.org, Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>, Alexei Starovoitov <ast@...com>, Joe Stringer <joe@....org>, Wang Nan <wangnan0@...wei.com>, Arnaldo Carvalho de Melo <acme@...hat.com> Subject: [PATCH 20/29] samples/bpf: Make perf_event_read() static From: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com> While testing Joe's conversion of samples/bpf/ to use tools/lib/bpf/ I noticed some warnings building samples/bpf/ on a Fedora Rawhide container, with clang/llvm 3.9 I noticed this: [root@...97fdfbf4f linux]# make -j4 O=/tmp/build/linux/ samples/bpf/ make[1]: Entering directory '/tmp/build/linux' CHK include/config/kernel.release GEN ./Makefile CHK include/generated/uapi/linux/version.h Using /git/linux as source for kernel <SNIP> HOSTCC samples/bpf/trace_output_user.o /git/linux/samples/bpf/trace_output_user.c:64:6: warning: no previous prototype for 'perf_event_read' [-Wmissing-prototypes] void perf_event_read(print_fn fn) ^~~~~~~~~~~~~~~ HOSTLD samples/bpf/trace_output make[1]: Leaving directory '/tmp/build/linux' Shut up the compiler by making that function static. Acked-by: Daniel Borkmann <daniel@...earbox.net> Cc: Alexei Starovoitov <ast@...com> Cc: Joe Stringer <joe@....org> Cc: Wang Nan <wangnan0@...wei.com> Link: http://lkml.kernel.org/r/20161215152927.GC6866@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- samples/bpf/trace_output_user.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/samples/bpf/trace_output_user.c b/samples/bpf/trace_output_user.c index 3bedd945def1..1a1da7bddb93 100644 --- a/samples/bpf/trace_output_user.c +++ b/samples/bpf/trace_output_user.c @@ -61,7 +61,7 @@ struct perf_event_sample { char data[]; }; -void perf_event_read(print_fn fn) +static void perf_event_read(print_fn fn) { __u64 data_tail = header->data_tail; __u64 data_head = header->data_head; -- 2.9.3
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