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GET /api/patches/2202912/?format=api
{ "id": 2202912, "url": "http://patchwork.ozlabs.org/api/patches/2202912/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260302011159.61778-2-ynorov@nvidia.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260302011159.61778-2-ynorov@nvidia.com>", "list_archive_url": null, "date": "2026-03-02T01:11:55", "name": "[v2,1/4] bitmap: introduce bitmap_weighted_xor()", "commit_ref": null, "pull_url": null, "state": "under-review", "archived": false, "hash": "cd6002fe8dc43d77b0da16b9f3f9a218a2b3f36c", "submitter": { "id": 92516, "url": "http://patchwork.ozlabs.org/api/people/92516/?format=api", "name": "Yury Norov", "email": "ynorov@nvidia.com" }, "delegate": { "id": 109701, "url": "http://patchwork.ozlabs.org/api/users/109701/?format=api", "username": "anguy11", "first_name": "Anthony", "last_name": "Nguyen", "email": "anthony.l.nguyen@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260302011159.61778-2-ynorov@nvidia.com/mbox/", "series": [ { "id": 493940, "url": "http://patchwork.ozlabs.org/api/series/493940/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=493940", "date": "2026-03-02T01:11:54", "name": "ice: use better bitmap API", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/493940/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2202912/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2202912/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=oburD2cU;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::138; 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mx.microsoft.com 1; spf=pass\n smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com;\n dkim=pass header.d=nvidia.com; arc=none", "To": "Tony Nguyen <anthony.l.nguyen@intel.com>,\n \"David S. Miller\" <davem@davemloft.net>,\n =?utf-8?q?Thomas_Hellstr=C3=B6m?= <thomas.hellstrom@linux.intel.com>,\n Andrew Lunn <andrew+netdev@lunn.ch>,\n Andrew Morton <akpm@linux-foundation.org>, David Airlie <airlied@gmail.com>,\n Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,\n Matthew Brost <matthew.brost@intel.com>, Paolo Abeni <pabeni@redhat.com>,\n Przemek Kitszel <przemyslaw.kitszel@intel.com>,\n Rodrigo Vivi <rodrigo.vivi@intel.com>, Simona Vetter <simona@ffwll.ch>,\n Yury Norov <yury.norov@gmail.com>,\n Rasmus Villemoes <linux@rasmusvillemoes.dk>, dri-devel@lists.freedesktop.org,\n intel-xe@lists.freedesktop.org, linux-kernel@vger.kernel.org,\n netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org", "Cc": "Yury Norov <ynorov@nvidia.com>, Simon Horman <horms@kernel.org>,\n David Laight <david.laight.linux@gmail.com>", "Date": "Sun, 1 Mar 2026 20:11:55 -0500", "Message-ID": "<20260302011159.61778-2-ynorov@nvidia.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260302011159.61778-1-ynorov@nvidia.com>", "References": "<20260302011159.61778-1-ynorov@nvidia.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "BN9PR03CA0141.namprd03.prod.outlook.com\n (2603:10b6:408:fe::26) To PH0PR12MB8800.namprd12.prod.outlook.com\n (2603:10b6:510:26f::12)", "MIME-Version": "1.0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "PH0PR12MB8800:EE_|PH8PR12MB7184:EE_", "X-MS-Office365-Filtering-Correlation-Id": "1480c59a-7de4-4fe6-14cb-08de77f8b783", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|366016|1800799024|10070799003|376014|7416014|921020;", "X-Microsoft-Antispam-Message-Info": "\n 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", "X-Forefront-Antispam-Report": "CIP:255.255.255.255; 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a=rsa-sha256; c=relaxed/relaxed;\n d=Nvidia.com; s=selector2;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=XXdoeZXUo11GbYcgW9+O9sb+qIeVeFihPLc+0pKtR/s=;\n b=K8EI44zN439ma9xFJBE2Dx8cORuR0sYkIHL1IQFsbm9wkwCqwTCNhCdY8wj3cj95YHavQrXa20unhaVW+4CH58FgjuGuIP3k/ecwkpZhRApFF1RrCMb15rnzB6zdqQ+icvM7sQHv0cdNznfVpIE8noO0KAFl+CjirBy+6VdVweDJvz3jj2x1ZWY4bkRJh+0p6J/bvIXH7TLGs2mUYtGoz7sdyNekVhizos6MWx4daRStUd6hFm/oHbV7fdcrDVPQEMg9c0r7GzuRuPZfrNT+ckdnKXbgoGWDhI9Nchs2EFhoSA7aKLdjzpdU/696l40t4cul3Ir81E6SmFxUJXiCeA==", "X-Mailman-Original-Authentication-Results": [ "smtp4.osuosl.org;\n dmarc=pass (p=reject dis=none)\n header.from=nvidia.com", "smtp4.osuosl.org;\n dkim=pass (2048-bit key,\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=K8EI44zN", "dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=nvidia.com;" ], "Subject": "[Intel-wired-lan] [PATCH v2 1/4] bitmap: introduce\n bitmap_weighted_xor()", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "From": "Yury Norov via Intel-wired-lan <intel-wired-lan@osuosl.org>", "Reply-To": "Yury Norov <ynorov@nvidia.com>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "The function helps to XOR bitmaps and calculate Hamming weight of\nthe result in one pass.\n\nSigned-off-by: Yury Norov <ynorov@nvidia.com>\n---\n include/linux/bitmap.h | 15 +++++++++++++++\n lib/bitmap.c | 7 +++++++\n 2 files changed, 22 insertions(+)", "diff": "diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h\nindex b0395e4ccf90..874f744870ef 100644\n--- a/include/linux/bitmap.h\n+++ b/include/linux/bitmap.h\n@@ -46,6 +46,7 @@ struct device;\n * bitmap_and(dst, src1, src2, nbits) *dst = *src1 & *src2\n * bitmap_or(dst, src1, src2, nbits) *dst = *src1 | *src2\n * bitmap_weighted_or(dst, src1, src2, nbits)\t*dst = *src1 | *src2. Returns Hamming Weight of dst\n+ * bitmap_weighted_xor(dst, src1, src2, nbits)\t*dst = *src1 ^ *src2. Returns Hamming Weight of dst\n * bitmap_xor(dst, src1, src2, nbits) *dst = *src1 ^ *src2\n * bitmap_andnot(dst, src1, src2, nbits) *dst = *src1 & ~(*src2)\n * bitmap_complement(dst, src, nbits) *dst = ~(*src)\n@@ -168,6 +169,8 @@ void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,\n \t\t const unsigned long *bitmap2, unsigned int nbits);\n unsigned int __bitmap_weighted_or(unsigned long *dst, const unsigned long *bitmap1,\n \t\t\t\t const unsigned long *bitmap2, unsigned int nbits);\n+unsigned int __bitmap_weighted_xor(unsigned long *dst, const unsigned long *bitmap1,\n+\t\t\t\t const unsigned long *bitmap2, unsigned int nbits);\n void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,\n \t\t const unsigned long *bitmap2, unsigned int nbits);\n bool __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,\n@@ -352,6 +355,18 @@ unsigned int bitmap_weighted_or(unsigned long *dst, const unsigned long *src1,\n \t}\n }\n \n+static __always_inline\n+unsigned int bitmap_weighted_xor(unsigned long *dst, const unsigned long *src1,\n+\t\t\t\tconst unsigned long *src2, unsigned int nbits)\n+{\n+\tif (small_const_nbits(nbits)) {\n+\t\t*dst = *src1 ^ *src2;\n+\t\treturn hweight_long(*dst & BITMAP_LAST_WORD_MASK(nbits));\n+\t} else {\n+\t\treturn __bitmap_weighted_xor(dst, src1, src2, nbits);\n+\t}\n+}\n+\n static __always_inline\n void bitmap_xor(unsigned long *dst, const unsigned long *src1,\n \t\tconst unsigned long *src2, unsigned int nbits)\ndiff --git a/lib/bitmap.c b/lib/bitmap.c\nindex 9dc526507875..a2bcb5b1fe99 100644\n--- a/lib/bitmap.c\n+++ b/lib/bitmap.c\n@@ -361,6 +361,13 @@ unsigned int __bitmap_weighted_or(unsigned long *dst, const unsigned long *bitma\n \treturn BITMAP_WEIGHT(({dst[idx] = bitmap1[idx] | bitmap2[idx]; dst[idx]; }), bits);\n }\n \n+unsigned int __bitmap_weighted_xor(unsigned long *dst, const unsigned long *bitmap1,\n+\t\t\t\t const unsigned long *bitmap2, unsigned int bits)\n+{\n+\treturn BITMAP_WEIGHT(({dst[idx] = bitmap1[idx] ^ bitmap2[idx]; dst[idx]; }), bits);\n+}\n+EXPORT_SYMBOL(__bitmap_weighted_xor);\n+\n void __bitmap_set(unsigned long *map, unsigned int start, int len)\n {\n \tunsigned long *p = map + BIT_WORD(start);\n", "prefixes": [ "v2", "1/4" ] }