From nobody Wed Feb 11 07:07:36 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 661C16086E for ; Wed, 6 Mar 2024 10:43:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709721804; cv=none; b=c1ye8KYpcGvgvBbg4WhSoxYyLO7bS73wcIdrkU19X6ryx/5AuI/eUu4Tzd7HRdV75brginYEmxO1g6SfzQNm6Uarss+KFo1xrmi1cPZZA5ZwzQwP2ns+NmH/jBz1UzMxeQgWLQcNtruGJvSvoyDupbCt5TcVmRG1WxdofJxeA68= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709721804; c=relaxed/simple; bh=G6OxanI3sTRxSNp5lhYS2YR/ic0+r3tVkIbUpPCZPlE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GJqM0OFlrZQKt+JNgZMfDlexAtjBhAD1IJ7khsmQNBQv6vWcxG9gNn8wotpLrEUH/zl5HhubSqBnU9+xKr321yOchKUrezq+Nz3EjXoXVBDncSQyxMpu9zgfyrcIev4kA5y6IAt+MosksPgdvtvafXCrw7uKz15IkryuBZzmits= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JNbaM2i1; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JNbaM2i1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1709721802; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=e0nyH5cfLKLNUyYVewKsf1JegzIgt6HCOMbuZo9oALU=; b=JNbaM2i1mcgLCyvO2kCMCRyCWI3woMUGWJnRkU2x0mnKRh3LqRsXgdx7TaFuMdCLguPIye tB8myjg3ibFFBEbgSTYk0vXTKgWgVk7u5qvzztyI8pEb8b1WUOfsQFr5JF1hRRJBSZgA+p DzfK9R1Nb848u5Gm2PiJi4ZgC7GcfzI= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-459-Hl-hIAJEPjGHPHHTtG8PNw-1; Wed, 06 Mar 2024 05:43:17 -0500 X-MC-Unique: Hl-hIAJEPjGHPHHTtG8PNw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 21BBC1C0513A; Wed, 6 Mar 2024 10:43:17 +0000 (UTC) Received: from x1n.redhat.com (unknown [10.72.116.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id D539F111DCFF; Wed, 6 Mar 2024 10:43:10 +0000 (UTC) From: peterx@redhat.com To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, Andrew Morton , Muchun Song , Jason Gunthorpe , peterx@redhat.com, Matthew Wilcox , Mike Rapoport , Christophe Leroy , x86@kernel.org, sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC 10/13] mm/gup: Merge pXd huge mapping checks Date: Wed, 6 Mar 2024 18:41:44 +0800 Message-ID: <20240306104147.193052-11-peterx@redhat.com> In-Reply-To: <20240306104147.193052-1-peterx@redhat.com> References: <20240306104147.193052-1-peterx@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 Content-Type: text/plain; charset="utf-8" From: Peter Xu Huge mapping checks in GUP are slightly redundant and can be simplified. pXd_huge() now is the same as pXd_leaf(). pmd_trans_huge() and pXd_devmap() should both imply pXd_leaf(). Time to merge them into one. Signed-off-by: Peter Xu Reviewed-by: Jason Gunthorpe --- mm/gup.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index f87a7d90f2ae..de7188d2af86 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -3005,8 +3005,7 @@ static int gup_pmd_range(pud_t *pudp, pud_t pud, unsi= gned long addr, unsigned lo if (!pmd_present(pmd)) return 0; =20 - if (unlikely(pmd_trans_huge(pmd) || pmd_huge(pmd) || - pmd_devmap(pmd))) { + if (unlikely(pmd_leaf(pmd))) { /* See gup_pte_range() */ if (pmd_protnone(pmd)) return 0; @@ -3043,7 +3042,7 @@ static int gup_pud_range(p4d_t *p4dp, p4d_t p4d, unsi= gned long addr, unsigned lo next =3D pud_addr_end(addr, end); if (unlikely(!pud_present(pud))) return 0; - if (unlikely(pud_huge(pud) || pud_devmap(pud))) { + if (unlikely(pud_leaf(pud))) { if (!gup_huge_pud(pud, pudp, addr, next, flags, pages, nr)) return 0; @@ -3096,7 +3095,7 @@ static void gup_pgd_range(unsigned long addr, unsigne= d long end, next =3D pgd_addr_end(addr, end); if (pgd_none(pgd)) return; - if (unlikely(pgd_huge(pgd))) { + if (unlikely(pgd_leaf(pgd))) { if (!gup_huge_pgd(pgd, pgdp, addr, next, flags, pages, nr)) return; --=20 2.44.0