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{
    "id": 805981,
    "url": "http://patchwork.ozlabs.org/api/patches/805981/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/20170825171043.84011-1-willemdebruijn.kernel@gmail.com/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
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    "msgid": "<20170825171043.84011-1-willemdebruijn.kernel@gmail.com>",
    "list_archive_url": null,
    "date": "2017-08-25T17:10:43",
    "name": "[net-next] xen-netback: update ubuf_info initialization to anonymous union",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": true,
    "hash": "dd842f58aae2bca7317b107e33c7d04876ab90f5",
    "submitter": {
        "id": 67615,
        "url": "http://patchwork.ozlabs.org/api/people/67615/?format=api",
        "name": "Willem de Bruijn",
        "email": "willemdebruijn.kernel@gmail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/20170825171043.84011-1-willemdebruijn.kernel@gmail.com/mbox/",
    "series": [],
    "comments": "http://patchwork.ozlabs.org/api/patches/805981/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/805981/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
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        "X-Received": "by 10.237.39.130 with SMTP id a2mr5406841qtd.114.1503681046659; \n\tFri, 25 Aug 2017 10:10:46 -0700 (PDT)",
        "From": "Willem de Bruijn <willemdebruijn.kernel@gmail.com>",
        "To": "netdev@vger.kernel.org",
        "Cc": "davem@davemloft.net, wei.liu2@citrix.com, paul.durrant@citrix.com,\n\tkbuild-all@01.org, Willem de Bruijn <willemb@google.com>",
        "Subject": "[PATCH net-next] xen-netback: update ubuf_info initialization to\n\tanonymous union",
        "Date": "Fri, 25 Aug 2017 13:10:43 -0400",
        "Message-Id": "<20170825171043.84011-1-willemdebruijn.kernel@gmail.com>",
        "X-Mailer": "git-send-email 2.14.1.342.g6490525c54-goog",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "From: Willem de Bruijn <willemb@google.com>\n\nThe xen driver initializes struct ubuf_info fields using designated\ninitializers. I recently moved these fields inside a nested anonymous\nstruct inside an anonymous union. I had missed this use case.\n\nThis breaks compilation of xen-netback with older compilers.\nFrom kbuild bot with gcc-4.4.7:\n\n   drivers/net//xen-netback/interface.c: In function\n   'xenvif_init_queue':\n   >> drivers/net//xen-netback/interface.c:554: error: unknown field 'ctx' specified in initializer\n   >> drivers/net//xen-netback/interface.c:554: warning: missing braces around initializer\n      drivers/net//xen-netback/interface.c:554: warning: (near initialization for '(anonymous).<anonymous>')\n   >> drivers/net//xen-netback/interface.c:554: warning: initialization makes integer from pointer without a cast\n   >> drivers/net//xen-netback/interface.c:555: error: unknown field 'desc' specified in initializer\n\nAdd double braces around the designated initializers to match their\nnested position in the struct. After this, compilation succeeds again.\n\nFixes: 4ab6c99d99bb (\"sock: MSG_ZEROCOPY notification coalescing\")\nReported-by: kbuild bot <lpk@intel.com>\nSigned-off-by: Willem de Bruijn <willemb@google.com>\n---\n drivers/net/xen-netback/interface.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)",
    "diff": "diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c\nindex e322a862ddfe..ee8ed9da00ad 100644\n--- a/drivers/net/xen-netback/interface.c\n+++ b/drivers/net/xen-netback/interface.c\n@@ -551,8 +551,8 @@ int xenvif_init_queue(struct xenvif_queue *queue)\n \tfor (i = 0; i < MAX_PENDING_REQS; i++) {\n \t\tqueue->pending_tx_info[i].callback_struct = (struct ubuf_info)\n \t\t\t{ .callback = xenvif_zerocopy_callback,\n-\t\t\t  .ctx = NULL,\n-\t\t\t  .desc = i };\n+\t\t\t  { { .ctx = NULL,\n+\t\t\t      .desc = i } } };\n \t\tqueue->grant_tx_handle[i] = NETBACK_INVALID_HANDLE;\n \t}\n \n",
    "prefixes": [
        "net-next"
    ]
}