From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f179.google.com (mail-pf1-f179.google.com [209.85.210.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5AC4A38F65B for ; Wed, 1 Jul 2026 17:19:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782926364; cv=none; b=kyIh8oS6pyfZXwMd0m3gyKPSdhsay+ySGQUd+Mxfb4smkfro2HxwGT7THp1Dfbo854DkxrETPFBrI1+ScEeerOfZ/lKIw0KDSN3TWdEKXj58ziBVQyJlcr9Uj2U8OF0vmxEH7OaxJ7EJt4ewK6/JAu8dmAovOs0C7prxf0+CB0s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782926364; c=relaxed/simple; bh=P99eqRlBlwzLtzf7uOhrPKQHNUZ35v6XtzK5Uzjw4Xs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E+jPiatRxzIoQQywiezRWAigrEe4+70WBEYANsMWnKjOs2S3hBNz6h0txEnPJSHGVLPhQzqjDIbZ7Q5FM+zj2s0J6w3KUF+S8g+37/I6tOJKy+k59flO+WTfOAm2gsqQ0jW/5eXB089GSV891oFY6sYaxPHizHMsUsejqjJMQWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=o4+8uKxC; arc=none smtp.client-ip=209.85.210.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="o4+8uKxC" Received: by mail-pf1-f179.google.com with SMTP id d2e1a72fcca58-845f2909cd4so485157b3a.1 for ; Wed, 01 Jul 2026 10:19:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1782926362; x=1783531162; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=a/4dtvv/aIQO81upj+w4QSeM/a48j6z5FlMxCli/iT4=; b=o4+8uKxC7Z+2U/D5WYSxlw+yxtmHY9y0y4n0ydmFm032GX0lP/ecImfgeX266Vzwma 5O8ZMKcXCv+pz4v41Z0K8gZrgxw7tt192ds7V/1T7WJHyPabgl9bapyZTD/DPQX1il1O STOfcoWGzrhnAIJMRejfZSYCC9wNMy8JWm950qNjmwQiVUkyNeq8//prRK4sG405DryC 3L1/FAKx1KrRK9mJHtqYOIShlA8uxznBIinphoQCWv0Dv4FfsTL4ny7ByIxN9oJ03pe2 fvRUQKOTME9garMM6qBqQquvJCkZsTtk3uQOcRyvm1PYgPEMIFjCzH0q6jP2o9JBvJ6Z gh2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782926362; x=1783531162; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=a/4dtvv/aIQO81upj+w4QSeM/a48j6z5FlMxCli/iT4=; b=o2j+pDBu9cS5lUCpLlM7WGSiGXo17nedtyfbQ785eAvQ7YFMrEKKYIk2wk0uc2+Z0M bgPgorZA2ZbC9DMwfGALzB43H/b15wFvY3uJ4DmN9bV+nJ0EC5aAXornZeXhjq+/xPHG YxhIPxK2xarpMfC3tfVxGb/4j+lyPNGoy8s1wkToEFl9Uvnzp7SGRw/U5AKeImgFOWL5 MhwDXeShWlf1UY/8jEKAUGy44DU/pBkYN8eWyZz6UBogUQb1lRZMB/1jJrzXePiG+mQF 1HGU9iPiB29uuWT9CDRfszeYjPm6OQXydaWBs4p8ywZ9aQngahS6PtPMyDd/6YQmfBnN +7bQ== X-Forwarded-Encrypted: i=1; AHgh+Rp8kGXv6LQM2ajW4AQFDuCpdS9/fSQLXrNlKuQ6r/Bx/3VQuMkVUuh1ImA9fRRhoTqhHdI++BjwfslBJKY=@vger.kernel.org X-Gm-Message-State: AOJu0Yw2wGUhhBGXWbvRxeHGrMvdywH+B0e+Jj3N3/oAVcbIhaOUCYeR Q9bQPCiNlliYul3c7qIzlEdibKlrGfxx3892sq8ChVA5mEnNKrjvDgyX X-Gm-Gg: AfdE7cmCqJi/xZ0LvuzlgkGOJ/kgFCy34AGHviE0TKzQxNAaf5PJMy/eOK6a9hLCUkB 2IeSXqhkOHAVwnRNRJzcdho9amP8P4eI3sHOhb3Iz94IoEkha4zvJBXhIaSyXs3P3e1zrGWUegp zFqxjVorF/WxlG3NMUogvgUHbV/aw+cRdiY795RwgYwwQmEuqNYrY9mcc5G/72fyfsNm7Y6sURO /AZNRiaxaN4za98eqVHbhUGcWWK+5RNaCdAHowBzUpH6QXMkd4qrbljsArLh0Kaj47eoIxf+GaO +3tMaP1ZsrmfE6zjJlvZ/Uoh5T0ujNo5LcCBFYyL6f8jIc+alFhJ/hDAhijcdbxDXCdMUr2fWI2 dR55kuIzzk6EhRJwnoiM32XH5QA2NAf4MoI9huJhEOThTw/g1J9PJPvkJdPkS/mQ9s7PfsEUdt5 1oPmJqqio= X-Received: by 2002:a05:6a00:2da2:b0:845:e146:e840 with SMTP id d2e1a72fcca58-847c077432cmr2338544b3a.24.1782926362374; Wed, 01 Jul 2026 10:19:22 -0700 (PDT) Received: from ubuntu.. ([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-847cb94ab79sm105719b3a.31.2026.07.01.10.19.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Jul 2026 10:19:21 -0700 (PDT) From: Sang-Heon Jeon To: akpm@linux-foundation.org, Yury Norov , Vlastimil Babka Cc: linux-mm@kvack.org, Sang-Heon Jeon , Andreas Larsson , Brendan Jackman , "David S. Miller" , Johannes Weiner , John Paul Adrian Glaubitz , linux-kernel@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Rasmus Villemoes , Rich Felker , Suren Baghdasaryan , Yoshinori Sato , Zi Yan Subject: [PATCH 4/4] mm/page_alloc: initialize node_possible_map like the other node maps Date: Thu, 2 Jul 2026 02:18:51 +0900 Message-ID: <20260701171851.2447626-5-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260701171851.2447626-1-ekffu200098@gmail.com> References: <20260701171851.2447626-1-ekffu200098@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit node_states[N_POSSIBLE], aliased by node_possible_map, is initialized to NODE_MASK_ALL, unlike the other entries, which are initialized with only node 0 set. On !NUMA, MAX_NUMNODES == 1, so initializing node_possible_map to NODE_MASK_ALL is equivalent to initializing it with only node 0 set. On NUMA, every architecture now sets node_possible_map after parsing its NUMA topology, so nothing relies on the initial value. So, instead of initializing node_possible_map to NODE_MASK_ALL, set only node 0, like the other entries. Then NODE_MASK_ALL is no longer used, so remove it and its only helper NODE_MASK_LAST_WORD. No functional change. Signed-off-by: Sang-Heon Jeon --- include/linux/nodemask.h | 20 -------------------- mm/page_alloc.c | 2 +- 2 files changed, 1 insertion(+), 21 deletions(-) diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h index b842aa525546..484fe366a94c 100644 --- a/include/linux/nodemask.h +++ b/include/linux/nodemask.h @@ -47,7 +47,6 @@ * MAX_NUMNODES * * nodemask_t nodemask_of_node(node) Return nodemask with bit 'node' set - * NODE_MASK_ALL Initializer - all bits set * NODE_MASK_NONE Initializer - no bits set * unsigned long *nodes_addr(mask) Array of unsigned long's in mask * @@ -296,25 +295,6 @@ static __always_inline unsigned int __first_unset_node(const nodemask_t *maskp) return min(MAX_NUMNODES, find_first_zero_bit(maskp->bits, MAX_NUMNODES)); } -#define NODE_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(MAX_NUMNODES) - -#if MAX_NUMNODES <= BITS_PER_LONG - -#define NODE_MASK_ALL \ -((nodemask_t) { { \ - [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \ -} }) - -#else - -#define NODE_MASK_ALL \ -((nodemask_t) { { \ - [0 ... BITS_TO_LONGS(MAX_NUMNODES)-2] = ~0UL, \ - [BITS_TO_LONGS(MAX_NUMNODES)-1] = NODE_MASK_LAST_WORD \ -} }) - -#endif - #define NODE_MASK_NONE \ ((nodemask_t) { { \ [0 ... BITS_TO_LONGS(MAX_NUMNODES)-1] = 0UL \ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 784a6e2f8ba0..c0f17dede824 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -191,7 +191,7 @@ EXPORT_SYMBOL(latent_entropy); * Array of node states. */ nodemask_t node_states[NR_NODE_STATES] __read_mostly = { - [N_POSSIBLE] = NODE_MASK_ALL, + [N_POSSIBLE] = { { [0] = 1UL } }, [N_ONLINE] = { { [0] = 1UL } }, #ifndef CONFIG_NUMA [N_NORMAL_MEMORY] = { { [0] = 1UL } }, -- 2.43.0