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GET /api/patches/48091/?format=api
{ "id": 48091, "url": "http://patchwork.dpdk.org/api/patches/48091/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/patch/c6841ea0b3e094eac086b44bad94566f9f9dd5a3.1542213812.git.anatoly.burakov@intel.com/", "project": { "id": 1, "url": "http://patchwork.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<c6841ea0b3e094eac086b44bad94566f9f9dd5a3.1542213812.git.anatoly.burakov@intel.com>", "list_archive_url": "https://inbox.dpdk.org/dev/c6841ea0b3e094eac086b44bad94566f9f9dd5a3.1542213812.git.anatoly.burakov@intel.com", "date": "2018-11-14T16:47:07", "name": "[v3,2/5] bitmap: rename rte_bsf64 and move to common header", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "cbf1fe9ab55f149af9b810310bbe9ca169a574e4", "submitter": { "id": 4, "url": "http://patchwork.dpdk.org/api/people/4/?format=api", "name": "Anatoly Burakov", "email": "anatoly.burakov@intel.com" }, "delegate": { "id": 1, "url": "http://patchwork.dpdk.org/api/users/1/?format=api", "username": "tmonjalo", "first_name": "Thomas", "last_name": "Monjalon", "email": "thomas@monjalon.net" }, "mbox": "http://patchwork.dpdk.org/project/dpdk/patch/c6841ea0b3e094eac086b44bad94566f9f9dd5a3.1542213812.git.anatoly.burakov@intel.com/mbox/", "series": [ { "id": 2424, "url": "http://patchwork.dpdk.org/api/series/2424/?format=api", "web_url": "http://patchwork.dpdk.org/project/dpdk/list/?series=2424", "date": "2018-11-14T16:47:06", "name": "[v3,1/5] bitmap: remove useless code", "version": 3, "mbox": "http://patchwork.dpdk.org/series/2424/mbox/" } ], "comments": "http://patchwork.dpdk.org/api/patches/48091/comments/", "check": "success", "checks": "http://patchwork.dpdk.org/api/patches/48091/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id C59311B206;\n\tWed, 14 Nov 2018 17:47:23 +0100 (CET)", "from mga12.intel.com (mga12.intel.com [192.55.52.136])\n\tby dpdk.org (Postfix) with ESMTP id 09BE41B113\n\tfor <dev@dpdk.org>; Wed, 14 Nov 2018 17:47:14 +0100 (CET)", "from orsmga004.jf.intel.com ([10.7.209.38])\n\tby fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t14 Nov 2018 08:47:14 -0800", "from irvmail001.ir.intel.com ([163.33.26.43])\n\tby orsmga004.jf.intel.com with ESMTP; 14 Nov 2018 08:47:11 -0800", "from sivswdev01.ir.intel.com (sivswdev01.ir.intel.com\n\t[10.237.217.45])\n\tby irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id\n\twAEGlBXJ032575; Wed, 14 Nov 2018 16:47:11 GMT", "from sivswdev01.ir.intel.com (localhost [127.0.0.1])\n\tby sivswdev01.ir.intel.com with ESMTP id wAEGlAd7017286;\n\tWed, 14 Nov 2018 16:47:10 GMT", "(from aburakov@localhost)\n\tby sivswdev01.ir.intel.com with LOCAL id wAEGlAOP017265;\n\tWed, 14 Nov 2018 16:47:10 GMT" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.56,233,1539673200\"; d=\"scan'208\";a=\"249682924\"", "From": "Anatoly Burakov <anatoly.burakov@intel.com>", "To": "dev@dpdk.org", "Cc": "Neil Horman <nhorman@tuxdriver.com>,\n\tJohn McNamara <john.mcnamara@intel.com>,\n\tMarko Kovacevic <marko.kovacevic@intel.com>,\n\tCristian Dumitrescu <cristian.dumitrescu@intel.com>,\n\tthomas@monjalon.net, bruce.richardson@intel.com,\n\tferruh.yigit@intel.com, jasvinder.singh@intel.com", "Date": "Wed, 14 Nov 2018 16:47:07 +0000", "Message-Id": "<c6841ea0b3e094eac086b44bad94566f9f9dd5a3.1542213812.git.anatoly.burakov@intel.com>", "X-Mailer": "git-send-email 1.7.0.7", "In-Reply-To": [ "<fbc68e4e563904b7758950cc50ecf0f753f4ec53.1542213812.git.anatoly.burakov@intel.com>", "<fbc68e4e563904b7758950cc50ecf0f753f4ec53.1542212598.git.anatoly.burakov@intel.com>" ], "References": [ "<fbc68e4e563904b7758950cc50ecf0f753f4ec53.1542213812.git.anatoly.burakov@intel.com>", "<fbc68e4e563904b7758950cc50ecf0f753f4ec53.1542212598.git.anatoly.burakov@intel.com>" ], "Subject": "[dpdk-dev] [PATCH v3 2/5] bitmap: rename rte_bsf64 and move to\n\tcommon header", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Rename rte_bsf64 to rte_bsf64_safe (this is a \"safe\" version in\nthat it prevents undefined behavior by checking if incoming\nparameter is zero) and move it to common header.\n\nSigned-off-by: Anatoly Burakov <anatoly.burakov@intel.com>\nAcked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>\n---\n\nNotes:\n v3:\n - Added clarification that pos is not checked\n\n doc/guides/rel_notes/deprecation.rst | 5 +++++\n lib/librte_eal/common/include/rte_bitmap.h | 14 ++++---------\n lib/librte_eal/common/include/rte_common.h | 23 ++++++++++++++++++++++\n 3 files changed, 32 insertions(+), 10 deletions(-)", "diff": "diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst\nindex 34b28234c..5d447e8eb 100644\n--- a/doc/guides/rel_notes/deprecation.rst\n+++ b/doc/guides/rel_notes/deprecation.rst\n@@ -22,6 +22,11 @@ Deprecation Notices\n \n + ``rte_eal_devargs_type_count``\n \n+* eal: function ``rte_bsf64`` in ``rte_bitmap.h`` has been renamed to\n+ ``rte_bsf64_safe`` and moved to ``rte_common.h``. A new ``rte_bsf64`` function\n+ will be added in release 19.05 in ``rte_common.h`` that follows convention set\n+ by existing ``rte_bsf32`` function.\n+\n * pci: Several exposed functions are misnamed.\n The following functions are deprecated starting from v17.11 and are replaced:\n \ndiff --git a/lib/librte_eal/common/include/rte_bitmap.h b/lib/librte_eal/common/include/rte_bitmap.h\nindex d2ed6204c..77727c828 100644\n--- a/lib/librte_eal/common/include/rte_bitmap.h\n+++ b/lib/librte_eal/common/include/rte_bitmap.h\n@@ -93,14 +93,10 @@ __rte_bitmap_index2_set(struct rte_bitmap *bmp)\n \tbmp->index2 = (((bmp->index1 << RTE_BITMAP_SLAB_BIT_SIZE_LOG2) + bmp->offset1) << RTE_BITMAP_CL_SLAB_SIZE_LOG2);\n }\n \n-static inline int\n+static inline int __rte_deprecated\n rte_bsf64(uint64_t slab, uint32_t *pos)\n {\n-\tif (slab == 0)\n-\t\treturn 0;\n-\n-\t*pos = __builtin_ctzll(slab);\n-\treturn 1;\n+\treturn rte_bsf64_safe(slab, pos);\n }\n \n static inline uint32_t\n@@ -408,9 +404,8 @@ __rte_bitmap_scan_search(struct rte_bitmap *bmp)\n \tvalue1 = bmp->array1[bmp->index1];\n \tvalue1 &= __rte_bitmap_mask1_get(bmp);\n \n-\tif (rte_bsf64(value1, &bmp->offset1)) {\n+\tif (rte_bsf64_safe(value1, &bmp->offset1))\n \t\treturn 1;\n-\t}\n \n \t__rte_bitmap_index1_inc(bmp);\n \tbmp->offset1 = 0;\n@@ -419,9 +414,8 @@ __rte_bitmap_scan_search(struct rte_bitmap *bmp)\n \tfor (i = 0; i < bmp->array1_size; i ++, __rte_bitmap_index1_inc(bmp)) {\n \t\tvalue1 = bmp->array1[bmp->index1];\n \n-\t\tif (rte_bsf64(value1, &bmp->offset1)) {\n+\t\tif (rte_bsf64_safe(value1, &bmp->offset1))\n \t\t\treturn 1;\n-\t\t}\n \t}\n \n \treturn 0;\ndiff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h\nindex 87f0f6302..d115b175c 100644\n--- a/lib/librte_eal/common/include/rte_common.h\n+++ b/lib/librte_eal/common/include/rte_common.h\n@@ -491,6 +491,29 @@ rte_fls_u32(uint32_t x)\n \treturn (x == 0) ? 0 : 32 - __builtin_clz(x);\n }\n \n+/**\n+ * Searches the input parameter for the least significant set bit\n+ * (starting from zero). Safe version (checks for input parameter being zero).\n+ *\n+ * @warning ``pos`` must be a valid pointer. It is not checked!\n+ *\n+ * @param v\n+ * The input parameter.\n+ * @param pos\n+ * If ``v`` was not 0, this value will contain position of least significant\n+ * bit within the input parameter.\n+ * @return\n+ * Returns 0 if ``v`` was 0, otherwise returns 1.\n+ */\n+static inline int\n+rte_bsf64_safe(uint64_t v, uint32_t *pos)\n+{\n+\tif (v == 0)\n+\t\treturn 0;\n+\n+\t*pos = __builtin_ctzll(v);\n+\treturn 1;\n+}\n \n #ifndef offsetof\n /** Return the offset of a field in a structure. */\n", "prefixes": [ "v3", "2/5" ] }