Patch Detail

HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 810233,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/810233/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/1504634367.15310.59.camel@edumazet-glaptop3.roam.corp.google.com/",
    "project": {
        "id": 7,
        "url": "http://patchwork.ozlabs.org/api/1.2/projects/7/?format=api",
        "name": "Linux network development",
        "link_name": "netdev",
        "list_id": "netdev.vger.kernel.org",
        "list_email": "netdev@vger.kernel.org",
        "web_url": null,
        "scm_url": null,
        "webscm_url": null,
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<1504634367.15310.59.camel@edumazet-glaptop3.roam.corp.google.com>",
    "list_archive_url": null,
    "date": "2017-09-05T17:59:27",
    "name": "radix-tree: must check __radix_tree_preload() return value",
    "commit_ref": null,
    "pull_url": null,
    "state": "not-applicable",
    "archived": true,
    "hash": "d5126e2d69147622bd2c91659ae01319678c9b36",
    "submitter": {
        "id": 2404,
        "url": "http://patchwork.ozlabs.org/api/1.2/people/2404/?format=api",
        "name": "Eric Dumazet",
        "email": "eric.dumazet@gmail.com"
    },
    "delegate": {
        "id": 34,
        "url": "http://patchwork.ozlabs.org/api/1.2/users/34/?format=api",
        "username": "davem",
        "first_name": "David",
        "last_name": "Miller",
        "email": "davem@davemloft.net"
    },
    "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/1504634367.15310.59.camel@edumazet-glaptop3.roam.corp.google.com/mbox/",
    "series": [
        {
            "id": 1619,
            "url": "http://patchwork.ozlabs.org/api/1.2/series/1619/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=1619",
            "date": "2017-09-05T17:59:27",
            "name": "radix-tree: must check __radix_tree_preload() return value",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/1619/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/810233/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/810233/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<netdev-owner@vger.kernel.org>",
        "X-Original-To": "patchwork-incoming@ozlabs.org",
        "Delivered-To": "patchwork-incoming@ozlabs.org",
        "Authentication-Results": [
            "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)",
            "ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"NBavwmqx\"; dkim-atps=neutral"
        ],
        "Received": [
            "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xmvcc10DXz9s7g\n\tfor <patchwork-incoming@ozlabs.org>;\n\tWed,  6 Sep 2017 03:59:44 +1000 (AEST)",
            "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1753251AbdIER7b (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tTue, 5 Sep 2017 13:59:31 -0400",
            "from mail-pg0-f67.google.com ([74.125.83.67]:38457 \"EHLO\n\tmail-pg0-f67.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1752154AbdIER73 (ORCPT\n\t<rfc822;netdev@vger.kernel.org>); Tue, 5 Sep 2017 13:59:29 -0400",
            "by mail-pg0-f67.google.com with SMTP id t3so2314881pgt.5;\n\tTue, 05 Sep 2017 10:59:28 -0700 (PDT)",
            "from ?IPv6:2620:15c:2c1:100:71d2:2db4:a10e:204e?\n\t([2620:15c:2c1:100:71d2:2db4:a10e:204e])\n\tby smtp.googlemail.com with ESMTPSA id\n\tt73sm2004578pgb.84.2017.09.05.10.59.27\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tTue, 05 Sep 2017 10:59:27 -0700 (PDT)"
        ],
        "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=message-id:subject:from:to:cc:date:mime-version\n\t:content-transfer-encoding;\n\tbh=/pzOR9YmtmBH8Y/vQZi4hxGR4ZdctGNteTkff2p3lmE=;\n\tb=NBavwmqxb48oVNI+qncXUEGMWxhfNvVJKGGMGlEWcTjVlE0z5XoM9tMs0cVqPrPTSl\n\tQ4ZueXUR2/+3bIXxxsyJrGYEraeCFmZ2D8R8GHH8BJe6QfhV1L299GpFxTwYXNQQaTw1\n\tvNFKFECMkgUXsjnFQjgKn8C3lm32fXay+GptEKrpFCMgysFAuH1dhGXmNFuEvpGT2XuQ\n\tsskWn7SnZa6RkeHSCPR03Zl5ngcVSiIQrIo3P/7JBzLPTBzidE9V4CX4l3DAVopTgwZE\n\tZ4qT8gSs8LAm41rRgZTp5zf8KarYeGIzLc4EXQ0yGedW4wu8SkjK8JZxAKBcEeKfMJnZ\n\tI8rA==",
        "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:message-id:subject:from:to:cc:date:mime-version\n\t:content-transfer-encoding;\n\tbh=/pzOR9YmtmBH8Y/vQZi4hxGR4ZdctGNteTkff2p3lmE=;\n\tb=hLcI3tR+aYjs3L4IOF7Y+e3XFek/nPfBaGRm7FXSwoxmiXmGF8AKonqi6MASRWFwKx\n\tjVHVARipluiMCyQQLZhsI+RlyiRXCcMHRCslVfpxdgVTba7o+EH5CyDBXiDsH6PisRLH\n\tfMZZiK3zHAW7BQ6Lk1Sst2xqmwNiKvdhBBOUi5mDk+pqtZ95/GheTX38G6mMBhdmbNpE\n\tChIcQDvoQrW4QXPhNhXCSS9ILekX6oJV6hccWRY6mzdWpfuPh6oWpDDq4Y3ToQRA98Mg\n\th+SxjEresBX/OnMQ79CfYEY998BMNfa3Wu3yLZPK3k0VO/k9lo1bMNpVTtCTP2hkxnz+\n\tPjNg==",
        "X-Gm-Message-State": "AHPjjUh8j0I920csKDg3JJOJWLq9nXVF5z5u+QxzLFgydncExuDZNqzZ\n\tC+LhRr9LxbbL1w==",
        "X-Google-Smtp-Source": "ADKCNb5wIRO9/5sKGIpxrFCa+iklozwwVWSw3uzRvPeXu5kix0hIs8YvOMsmqdgFm0f+IxgCgHavmw==",
        "X-Received": "by 10.98.82.74 with SMTP id g71mr4494253pfb.300.1504634368640;\n\tTue, 05 Sep 2017 10:59:28 -0700 (PDT)",
        "Message-ID": "<1504634367.15310.59.camel@edumazet-glaptop3.roam.corp.google.com>",
        "Subject": "[PATCH] radix-tree: must check __radix_tree_preload() return value",
        "From": "Eric Dumazet <eric.dumazet@gmail.com>",
        "To": "Matthew Wilcox <willy@infradead.org>",
        "Cc": "Matthew Wilcox <mawilcox@microsoft.com>,\n\t\"Kirill A. Shutemov\" <kirill.shutemov@linux.intel.com>,\n\tAndrew Morton <akpm@linux-foundation.org>,\n\tnetdev <netdev@vger.kernel.org>,\n\tLinus Torvalds <torvalds@linux-foundation.org>,\n\tlinux-kernel <linux-kernel@vger.kernel.org>",
        "Date": "Tue, 05 Sep 2017 10:59:27 -0700",
        "Content-Type": "text/plain; charset=\"UTF-8\"",
        "X-Mailer": "Evolution 3.10.4-0ubuntu2 ",
        "Mime-Version": "1.0",
        "Content-Transfer-Encoding": "7bit",
        "Sender": "netdev-owner@vger.kernel.org",
        "Precedence": "bulk",
        "List-ID": "<netdev.vger.kernel.org>",
        "X-Mailing-List": "netdev@vger.kernel.org"
    },
    "content": "From: Eric Dumazet <edumazet@google.com>\n\n__radix_tree_preload() only disables preemption if no error is returned.\n\nSo we really need to make sure callers always check the return value.\n\nidr_preload() contract is to always disable preemption, so we need\nto add a missing preempt_disable() if an error happened.\n\nSimilarly, ida_pre_get() only needs to call preempt_enable() in the\ncase no error happened.\n\nFixes: 0a835c4f090a (\"Reimplement IDR and IDA using the radix tree\")\nFixes: 7ad3d4d85c7a (\"ida: Move ida_bitmap to a percpu variable\")\nSigned-off-by: Eric Dumazet <edumazet@google.com>\nCc: <stable@vger.kernel.org>    [4.11+]\n---\n lib/radix-tree.c |   12 ++++++++----\n 1 file changed, 8 insertions(+), 4 deletions(-)",
    "diff": "diff --git a/lib/radix-tree.c b/lib/radix-tree.c\nindex 3527eb364964..fac702039304 100644\n--- a/lib/radix-tree.c\n+++ b/lib/radix-tree.c\n@@ -463,7 +463,7 @@ radix_tree_node_free(struct radix_tree_node *node)\n  * To make use of this facility, the radix tree must be initialised without\n  * __GFP_DIRECT_RECLAIM being passed to INIT_RADIX_TREE().\n  */\n-static int __radix_tree_preload(gfp_t gfp_mask, unsigned nr)\n+static __must_check int __radix_tree_preload(gfp_t gfp_mask, unsigned nr)\n {\n \tstruct radix_tree_preload *rtp;\n \tstruct radix_tree_node *node;\n@@ -2104,7 +2104,10 @@ EXPORT_SYMBOL(radix_tree_tagged);\n  */\n void idr_preload(gfp_t gfp_mask)\n {\n-\t__radix_tree_preload(gfp_mask, IDR_PRELOAD_SIZE);\n+\tint ret = __radix_tree_preload(gfp_mask, IDR_PRELOAD_SIZE);\n+\n+\tif (ret)\n+\t\tpreempt_disable();\n }\n EXPORT_SYMBOL(idr_preload);\n \n@@ -2118,13 +2121,14 @@ EXPORT_SYMBOL(idr_preload);\n  */\n int ida_pre_get(struct ida *ida, gfp_t gfp)\n {\n-\t__radix_tree_preload(gfp, IDA_PRELOAD_SIZE);\n+\tint ret = __radix_tree_preload(gfp, IDA_PRELOAD_SIZE);\n \t/*\n \t * The IDA API has no preload_end() equivalent.  Instead,\n \t * ida_get_new() can return -EAGAIN, prompting the caller\n \t * to return to the ida_pre_get() step.\n \t */\n-\tpreempt_enable();\n+\tif (!ret)\n+\t\tpreempt_enable();\n \n \tif (!this_cpu_read(ida_bitmap)) {\n \t\tstruct ida_bitmap *bitmap = kmalloc(sizeof(*bitmap), gfp);\n",
    "prefixes": []
}