From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 37D8DCA601E for ; Fri, 9 Oct 2026 13:33:17 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4j1SVM38sjz3048; Sat, 10 Oct 2026 00:33:15 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2001:41d0:203:375::53" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1791527870; cv=none; b=LxYQXVxaik3WwoBjQsBkDdufCMfQrsqKf3hssUxSyyJLOP5urDGiFYQ4iz528E/5yqJ58pBhA/XHSEZ8Pt7rXgvhGUGjE03+M3MCfoc5cfOZ0TgyY8P7izFiKckDRJcZym+iaD1vBirfO+jlpqnQfW7gQWZ6pJElKUMqbr6Sk4XcKaW6yu7vhrdzRLdXMXClefbQMpChYJfVZNqBqn/pXIaLxAZvUVZr+7RyO454KPo4wb6/1fcD7IHRpTJ8tkUerLS44NEXCP/HKtOFEt/MbVXmj1NvYDwFq2cnTRoO8FjKmzkYQry+F19YjgO/U1RV0PscdaQz57CLdWUyKlA7rg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1791527870; c=relaxed/relaxed; bh=gwbIZGd5qls122noWJbSBAeZAIWZFmcFvm7JGqAUwiY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=iRlARS7v1rTuRFCOd/ogvbm9J9zyQ9va4z6WiYOpW1NHbOgFXzgkYYvwUiuDZ7njVXImczII/uoqGjDkiSnKBglKT4+MIepvtgN12DZpZ/eP5cXhLUOKM4+etfXKetQjSH2L4WLduzRrZko4zeSsU+mWeaI2MIrAIsx43gGU9byct4slwUQofmAjeDwXm3TmF5YWMaXreiDb6MJ1mBtJu69aW9oIkZaDB3zPthcbo+LswZgUypIhmjb5lGEMj3QADVGdyIYZHq0A0yPL3ZBjG4DUYPNRDpvRzSqBlPvEMpwdgTDk4fE1/h6peN1c763giQu8MIS+bk4JpC+yDL0FZA== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.dev; dkim=pass (1024-bit key; unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=um5U0PxW; dkim-atps=neutral; spf=pass (client-ip=2001:41d0:203:375::53; helo=mta1.migadu.com; envelope-from=hao.ge@linux.dev; receiver=lists.ozlabs.org) smtp.mailfrom=linux.dev Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=um5U0PxW; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.dev (client-ip=2001:41d0:203:375::53; helo=mta1.migadu.com; envelope-from=hao.ge@linux.dev; receiver=lists.ozlabs.org) Received: from mta1.migadu.com (out-83.mta1.migadu.com [IPv6:2001:41d0:203:375::53]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4j1HH15R9Hz2y32 for ; Fri, 09 Oct 2026 17:37:49 +1100 (AEDT) X-Envelope-To: linuxppc-dev@lists.ozlabs.org DKIM-Signature: a=rsa-sha256; bh=Uktr6zhQvbp9EzuGh+m96ZQeOR2JVBFEMc1HzncifB8=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1791527851; v=1; x=1792132651; b=um5U0PxWdC1hIK739wWReTkrA+bX0NFpjR5h3bbnqcSiZyrsyIIcu/dixlUwZ7j/mfobLrYz c3N6MtOxH4dzrIAopJPuDH1Xm8LypOAVfi3znaV/bfbFF/THcFyjyJNaG6s0Kl8L/k/vs+Mls/L IGEBNxaiozv/T+vTH6xTTLHg= X-Envelope-To: linuxppc-dev@lists.ozlabs.org Received: by smtp.migadu.com with ESMTPS id 540e04d12dbe99da; Fri, 09 Oct 2026 06:36:12 +0000 X-Mizu-Trace-ID: 540e04d12dbe99da X-Migadu-Flow: FLOW_OUT From: Hao Ge To: Suren Baghdasaryan , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , "Ritesh Harjani (IBM)" , Shrikanth Hegde , Alexander Potapenko , Marco Elver , Dmitry Vyukov , Andrew Morton , Dennis Zhou , Tejun Heo , Christoph Lameter , Uladzislau Rezki Cc: Hao Ge , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org Subject: [RFC PATCH 3/4] powerpc: drop redundant unmaps of failed vmap mappings Date: Fri, 9 Oct 2026 14:36:18 +0800 Message-Id: <20261009063619.112313-4-hao.ge@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20261009063619.112313-1-hao.ge@linux.dev> References: <20261009063619.112313-1-hao.ge@linux.dev> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit vmap_page_range() and ioremap_page_range() clear the PTEs they installed when they fail, so the vunmap_range() in remap_isa_base() and ioremap_phb() has nothing left to remove. Signed-off-by: Hao Ge --- arch/powerpc/kernel/isa-bridge.c | 5 ++--- arch/powerpc/kernel/pci_64.c | 4 +--- 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c index 5c064485197a..93029d85e6ea 100644 --- a/arch/powerpc/kernel/isa-bridge.c +++ b/arch/powerpc/kernel/isa-bridge.c @@ -46,9 +46,8 @@ static void remap_isa_base(phys_addr_t pa, unsigned long size) WARN_ON_ONCE(size & ~PAGE_MASK); if (slab_is_available()) { - if (vmap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa, - pgprot_noncached(PAGE_KERNEL))) - vunmap_range(ISA_IO_BASE, ISA_IO_BASE + size); + vmap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa, + pgprot_noncached(PAGE_KERNEL)); } else { early_ioremap_range(ISA_IO_BASE, pa, size, pgprot_noncached(PAGE_KERNEL)); diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index e27342ef128b..f74269636d5e 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -139,10 +139,8 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size) addr = (unsigned long)area->addr; if (ioremap_page_range(addr, addr + size, paddr, - pgprot_noncached(PAGE_KERNEL))) { - vunmap_range(addr, addr + size); + pgprot_noncached(PAGE_KERNEL))) return NULL; - } return (void __iomem *)addr; } -- 2.25.1