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Date:   Wed, 20 May 2020 09:57:43 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Björn Töpel <bjorn.topel@...il.com>
Cc:     ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
        hawk@...nel.org, john.fastabend@...il.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, magnus.karlsson@...el.com,
        jonathan.lemon@...il.com, jeffrey.t.kirsher@...el.com,
        maximmi@...lanox.com, maciej.fijalkowski@...el.com,
        bjorn.topel@...el.com
Subject: Re: [PATCH bpf-next v4 03/15] xsk: move driver interface to
 xdp_sock_drv.h

On Wed, 20 May 2020 11:47:30 +0200 Björn Töpel wrote:
> From: Magnus Karlsson <magnus.karlsson@...el.com>
> 
> Move the AF_XDP zero-copy driver interface to its own include file
> called xdp_sock_drv.h. This, hopefully, will make it more clear for
> NIC driver implementors to know what functions to use for zero-copy
> support.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>

With W=1:

net/xdp/xsk_queue.c:67:26: warning: symbol 'xsk_reuseq_prepare' was not declared. Should it be static?
net/xdp/xsk_queue.c:86:26: warning: symbol 'xsk_reuseq_swap' was not declared. Should it be static?
net/xdp/xsk_queue.c:108:6: warning: symbol 'xsk_reuseq_free' was not declared. Should it be static?
net/xdp/xsk_queue.c:67:27: warning: no previous prototype for xsk_reuseq_prepare [-Wmissing-prototypes]
  67 | struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries)
     |                           ^~~~~~~~~~~~~~~~~~
net/xdp/xsk_queue.c:86:27: warning: no previous prototype for xsk_reuseq_swap [-Wmissing-prototypes]
  86 | struct xdp_umem_fq_reuse *xsk_reuseq_swap(struct xdp_umem *umem,
     |                           ^~~~~~~~~~~~~~~
net/xdp/xsk_queue.c:108:6: warning: no previous prototype for xsk_reuseq_free [-Wmissing-prototypes]
 108 | void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq)
     |      ^~~~~~~~~~~~~~~

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