From nobody Mon May 11 07:46:22 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2A44BC433F5 for ; Mon, 11 Apr 2022 07:26:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243453AbiDKH2Q (ORCPT ); Mon, 11 Apr 2022 03:28:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60662 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244009AbiDKH2N (ORCPT ); Mon, 11 Apr 2022 03:28:13 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41BD03A71F for ; Mon, 11 Apr 2022 00:25:42 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id s10so5589358plg.9 for ; Mon, 11 Apr 2022 00:25:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Bh2DzyN58v9sjiKDaPQqaLzWWkYE7+ay/uZ6IfCvCxQ=; b=nOWJnwIlswvCbzCOlCXxNOcBrWbKLNT64P909otnZtJ7LJ6EhnAKunQIn0+eSfZNAu 7dRlwFzq84Fi4wbJVVKUoUpvUZjsUXD5Oc2xo5/58d/2TcSzuVHC4FyORaGXmYqZrRBP 3e1CTcRSFBQA5TpR0fOe64ny9MRHY+oXpBdxSL0t4A+DSCFczdjwNKRWTEyKNOKem+Ti zXqMn1CKHCa02LCXvJNGsDSDkk/QPottZWg+RbkZEBj7r0//A8RnqoicDU2FWgNCBxEi 4J2amMOV5+XxrwhITqROjMPz9HvjBlMNHMNQZnLOpQyvG958bNnQaSMMJbovG97IpMXE WyDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Bh2DzyN58v9sjiKDaPQqaLzWWkYE7+ay/uZ6IfCvCxQ=; b=xIHZP3n3M3t3Aa7JL2OglcTyEsURfMa7DTbK9pV06L6VO48Dk9eUW3xVvkTpewXcTd 2hk1axTjmF+caoVsKPHPR0gg69eEJ7NQniFI23293QZetFMfNNMqQShkSSSPne5YB6YU RX/DdndTvaOlBvOuPkiOFiIsBD+1Bx3kJKsAuZ0fJonppOMByhw0YS27LVUwTGAx9sqS GuzU8HI2vw2DzAfqgGseD5b36Xomy/OKLKsPoSIsjjjR707diPbJdtv4M9/wu/pFXhRh GTjTHilV9TL931OIql7ckx5o+4UWPguhVVCWl8NSHH9oFpDcuLwsaqevSsaJEsmt9NKG QaOQ== X-Gm-Message-State: AOAM532EF4RmYTSTfgo+psKlRTvKXD+zP+347Gk2JlPdOftndCQTMOI7 XXyA4YpVrRBv1cdwlwZj+Q== X-Google-Smtp-Source: ABdhPJzd2DwMb8CiNDtt27JzEGa23aU8WaY1BEHvp7t0AkiNpPxQqrjGQMeKP/+7CEwBU/KkipvddA== X-Received: by 2002:a17:90a:da02:b0:1bf:3919:f2a with SMTP id e2-20020a17090ada0200b001bf39190f2amr35483524pjv.208.1649661941617; Mon, 11 Apr 2022 00:25:41 -0700 (PDT) Received: from localhost.localdomain ([121.165.123.189]) by smtp.gmail.com with ESMTPSA id g6-20020a056a001a0600b004f7bd56cc08sm33708527pfv.123.2022.04.11.00.25.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Apr 2022 00:25:41 -0700 (PDT) From: JaeSang Yoo X-Google-Original-From: JaeSang Yoo To: Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Vlastimil Babka , Roman Gushchin Cc: Ohhoon Kwon , Wonhyuk Yang , Jiyoup Kim , Donghyeok Kim , Christoph Lameter , JaeSang Yoo , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm/slub: remove unused parameter in setup_object*() Date: Mon, 11 Apr 2022 16:25:34 +0900 Message-Id: <20220411072534.3372768-1-jsyoo5b@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" setup_object_debug() and setup_object() has unused parameter, "struct slab *slab". Remove it. By the commit 3ec0974210fe ("SLUB: Simplify debug code"), setup_object_debug() were introduced to refactor previous code blocks in the setup_object(). Previous code used SlabDebug() to init_object() and init_tracking(). As the SlabDebug() takes "struct page *page" as argument, the setup_object_debug() checks flag of "struct kmem_cache *s" which doesn't require "struct page *page". As the struct page were changed into struct slab by commit bb192ed9aa719 ("mm/slub: Convert most struct page to struct slab by spatch"), but it's still unused parameter. Suggested-by: Ohhoon Kwon Signed-off-by: JaeSang Yoo Acked-by: David Rientjes --- mm/slub.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 9fe000fd19ca..273bbba74ca1 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1264,8 +1264,7 @@ static inline void dec_slabs_node(struct kmem_cache *= s, int node, int objects) } =20 /* Object debug checks for alloc/free paths */ -static void setup_object_debug(struct kmem_cache *s, struct slab *slab, - void *object) +static void setup_object_debug(struct kmem_cache *s, void *object) { if (!kmem_cache_debug_flags(s, SLAB_STORE_USER|SLAB_RED_ZONE|__OBJECT_POI= SON)) return; @@ -1631,8 +1630,7 @@ slab_flags_t kmem_cache_flags(unsigned int object_siz= e, return flags | slub_debug_local; } #else /* !CONFIG_SLUB_DEBUG */ -static inline void setup_object_debug(struct kmem_cache *s, - struct slab *slab, void *object) {} +static inline void setup_object_debug(struct kmem_cache *s, void *object) = {} static inline void setup_slab_debug(struct kmem_cache *s, struct slab *slab, void *addr)= {} =20 @@ -1775,10 +1773,9 @@ static inline bool slab_free_freelist_hook(struct km= em_cache *s, return *head !=3D NULL; } =20 -static void *setup_object(struct kmem_cache *s, struct slab *slab, - void *object) +static void *setup_object(struct kmem_cache *s, void *object) { - setup_object_debug(s, slab, object); + setup_object_debug(s, object); object =3D kasan_init_slab_obj(s, object); if (unlikely(s->ctor)) { kasan_unpoison_object_data(s, object); @@ -1897,13 +1894,13 @@ static bool shuffle_freelist(struct kmem_cache *s, = struct slab *slab) /* First entry is used as the base of the freelist */ cur =3D next_freelist_entry(s, slab, &pos, start, page_limit, freelist_count); - cur =3D setup_object(s, slab, cur); + cur =3D setup_object(s, cur); slab->freelist =3D cur; =20 for (idx =3D 1; idx < slab->objects; idx++) { next =3D next_freelist_entry(s, slab, &pos, start, page_limit, freelist_count); - next =3D setup_object(s, slab, next); + next =3D setup_object(s, next); set_freepointer(s, cur, next); cur =3D next; } @@ -1974,11 +1971,11 @@ static struct slab *allocate_slab(struct kmem_cache= *s, gfp_t flags, int node) =20 if (!shuffle) { start =3D fixup_red_left(s, start); - start =3D setup_object(s, slab, start); + start =3D setup_object(s, start); slab->freelist =3D start; for (idx =3D 0, p =3D start; idx < slab->objects - 1; idx++) { next =3D p + s->size; - next =3D setup_object(s, slab, next); + next =3D setup_object(s, next); set_freepointer(s, p, next); p =3D next; } --=20 2.25.1