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Date: Sat, 16 Apr 2016 17:47:42 -0700 From: Alexei Starovoitov <alexei.starovoitov@...il.com> To: Arnd Bergmann <arnd@...db.de> Cc: "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...hat.com>, Alexei Starovoitov <ast@...com>, Daniel Borkmann <daniel@...earbox.net>, linux-kernel@...r.kernel.org, fengguang.wu@...el.com Subject: Re: [PATCH] bpf: avoid warning for wrong pointer cast On Sat, Apr 16, 2016 at 10:29:33PM +0200, Arnd Bergmann wrote: > Two new functions in bpf contain a cast from a 'u64' to a > pointer. This works on 64-bit architectures but causes a warning > on all 32-bit architectures: > > kernel/trace/bpf_trace.c: In function 'bpf_perf_event_output_tp': > kernel/trace/bpf_trace.c:350:13: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] > u64 ctx = *(long *)r1; > > This changes the cast to first convert the u64 argument into a uintptr_t, > which is guaranteed to be the same size as a pointer. > > Signed-off-by: Arnd Bergmann <arnd@...db.de> > Fixes: 9940d67c93b5 ("bpf: support bpf_get_stackid() and bpf_perf_event_output() in tracepoint programs") Thanks. Acked-by: Alexei Starovoitov <ast@...nel.org> I guess I started to rely on 0-day build-bot too much. This patch has been in my tree for 2+ weeks and then in net-next and I didn't receive a single email from build-bot about this warning, though I do receive them for my other work-in-progress stuff. Odd. Fengguang, any idea why build-bot sometimes silent?
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