Re: [PATCH, net-next] perf, bpf: fix conditional call to bpf_overflow_handler

From: Ingo Molnar
Date: Thu Sep 08 2016 - 02:31:02 EST



* Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote:

> On Tue, Sep 06, 2016 at 03:10:22PM +0200, Arnd Bergmann wrote:
> > The newly added bpf_overflow_handler function is only built of both
> > CONFIG_EVENT_TRACING and CONFIG_BPF_SYSCALL are enabled, but the caller
> > only checks the latter:
> >
> > kernel/events/core.c: In function 'perf_event_alloc':
> > kernel/events/core.c:9106:27: error: 'bpf_overflow_handler' undeclared (first use in this function)
> >
> > This changes the caller so we also skip this call if CONFIG_EVENT_TRACING
> > is disabled entirely.
> >
> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> > Fixes: aa6a5f3cb2b2 ("perf, bpf: add perf events core support for BPF_PROG_TYPE_PERF_EVENT programs")
> > ---
> > kernel/events/core.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > I'm not entirely sure if this is the correct solution, please check before applying
>
> Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
>
> Thanks for the fix. Just saw build bot complaining last night and
> by the morning your fix is already here. Thanks!

Guys, this is the first time I saw this patch (and presumably there's some other
patch as well?) - could you please submit it properly for review and get an
Acked-by from one of the perf maintainers before appying it?

Thanks,

Ingo