netdev - Re: [bpf-next v2 8/9] bpf: Provide helper to do forwarding lookups in kernel FIB table

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Date:   Wed, 9 May 2018 10:05:56 -0600
From:   David Ahern <dsahern@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
        borkmann@...earbox.net, ast@...nel.org
Cc:     davem@...emloft.net, shm@...ulusnetworks.com,
        roopa@...ulusnetworks.com, brouer@...hat.com, toke@...e.dk,
        john.fastabend@...il.com
Subject: Re: [bpf-next v2 8/9] bpf: Provide helper to do forwarding lookups in
 kernel FIB table

On 5/9/18 2:15 AM, Daniel Borkmann wrote:
> 
> Ohh well, this is causing allmodconfig build warnings (e.g. on x86) as reported today:

lovely.

> 
> In file included from include/linux/dma-mapping.h:5:0,
>                  from include/linux/skbuff.h:34,
>                  from include/linux/if_ether.h:23,
>                  from include/uapi/linux/bpf.h:13,
>                  from include/linux/bpf-cgroup.h:6,
>                  from include/linux/cgroup-defs.h:22,
>                  from include/linux/cgroup.h:28,
>                  from include/linux/perf_event.h:57,
>                  from include/linux/trace_events.h:10,
>                  from include/trace/trace_events.h:20,
>                  from include/trace/define_trace.h:96,
>                  from drivers/android/binder_trace.h:387,
>                  from drivers/android/binder.c:5702:
> include/linux/sizes.h:24:0: warning: "SZ_1K" redefined
>  #define SZ_1K    0x00000400
> drivers/android/binder.c:116:0: note: this is the location of the previous definition
>  #define SZ_1K                               0x400

binder.c has very few recent commits to it. Are you ok with me
submitting the change with the others in this set (with proper cc's of
course)?

> fs/ecryptfs/miscdev.c:206:0: warning: "PKT_TYPE_OFFSET" redefined
>  #define PKT_TYPE_OFFSET  0
> In file included from include/linux/if_ether.h:23:0,
>                  from include/uapi/linux/bpf.h:13,
>                  from include/linux/bpf-cgroup.h:6,
>                  from include/linux/cgroup-defs.h:22,
>                  from include/linux/cgroup.h:28,
>                  from include/linux/writeback.h:183,
>                  from include/linux/backing-dev.h:16,
>                  from fs/ecryptfs/ecryptfs_kernel.h:41,
>                  from fs/ecryptfs/miscdev.c:30:
> include/linux/skbuff.h:753:0: note: this is the location of the previous definition
>  #define PKT_TYPE_OFFSET() offsetof(struct sk_buff, __pkt_type_offset)

And this one I renamed to SKB_PKT_TYPE_OFFSET

With that it compiles cleanly.

> 
> Lets get a clean, proper version of the whole series into bpf-next. I've dropped it
> from there right now and waiting for your v3 respin to apply with the above fixed.
> 
> Thank you.
>