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Date: Fri, 26 Jul 2019 14:47:28 -0700 From: Andrii Nakryiko <andrii.nakryiko@...il.com> To: Stanislav Fomichev <sdf@...ichev.me> Cc: Andrii Nakryiko <andriin@...com>, bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>, Alexei Starovoitov <ast@...com>, Daniel Borkmann <daniel@...earbox.net>, Kernel Team <kernel-team@...com> Subject: Re: [PATCH bpf-next 4/9] libbpf: add libbpf_swap_print to get previous print func On Fri, Jul 26, 2019 at 2:28 PM Stanislav Fomichev <sdf@...ichev.me> wrote: > > On 07/26, Andrii Nakryiko wrote: > > libbpf_swap_print allows to restore previously set print function. > > This is useful when running many independent test with one default print > > function, but overriding log verbosity for particular subset of tests. > Can we change the return type of libbpf_set_print instead and return > the old function from it? Will it break ABI? Yeah, thought about that, but I wasn't sure about ABI breakage. It seems like it shouldn't, so I'll just change libbpf_set_print signature instead. > > > Signed-off-by: Andrii Nakryiko <andriin@...com> > > --- > > tools/lib/bpf/libbpf.c | 8 ++++++++ > > tools/lib/bpf/libbpf.h | 1 + > > tools/lib/bpf/libbpf.map | 5 +++++ > > 3 files changed, 14 insertions(+) > > [...]
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