From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 BA54E386568 for ; Wed, 13 May 2026 19:24:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778700270; cv=none; b=TaENZ34MNajfG8XJ0Uwct+FN8P4hzcCE/AHn5la0BMyYG1oZsvcslIxSkwXS1D6YHxmYQLdtc/lwsHdxWvR3sZe5Gv+0UrFStXvsQIp3sHciCBKIAuogQkn3v9Z+RWZ377HFlpnq6se/gcR7PzekZwjxVvUNAWmLP0zH9CSTDbk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778700270; c=relaxed/simple; bh=IPzR2oeWaCwj4SE30oHislmWvU1lRp90iBCR6DqORbs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fWISk9eVYolwVhs6hA8lT9Ju38cSOMRARG4ezBhei1R0ovTdjJGWId8+SQ11z2U6LYPEp5dtjAg0Tynj1p+fWgvjUV2hIwWPUMOMrN5Op2BmC70KI1dHkG2JmUYwxidaJgrh/w5+Ca7Rx3jlWGeaonRhIM9G1K854N/rckpRL1I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Z18ZWzLE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Z18ZWzLE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E63CC19425; Wed, 13 May 2026 19:24:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778700270; bh=IPzR2oeWaCwj4SE30oHislmWvU1lRp90iBCR6DqORbs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Z18ZWzLE35/EWDGxOgcJYsRjPRFG+a2/V2pe/SpipoM9Q+ZoWDR5cEqmqFzqMHykH 4AQcsIFk77gVq/vTtpsnvfRkG4Jxfkq9/TfVq4tTOTlsexbolOFGVOkPzbJY1K6rs8 2/pFB0oLL0hD70FC6Y3+onI3UWr0x3Av1xw/4Hyap982JM5pISJ0c8MZJK/zksY4lb IIetMLljICnP5L5V/dGUpw14y+hVRvdRtiFO1BZ4pds9aRjYQq/rbo4V6DKO0pUwvw Q7bfjV1FyJQgweCHhCqn/XNStClgpSpJ6+nhcjX0ebTTBlxV/T+eyNNncz5j2dlWux Z+nAWSQia69VQ== Message-ID: <02d24f5d-ed6c-4b9c-a4ce-50b24a99622a@kernel.org> Date: Wed, 13 May 2026 21:24:20 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/13] mm: add softleaf_to_pmd() and convert existing callers To: Usama Arif , Andrew Morton , chrisl@kernel.org, kasong@tencent.com, ljs@kernel.org, ziy@nvidia.com Cc: bhe@redhat.com, willy@infradead.org, youngjun.park@lge.com, hannes@cmpxchg.org, riel@surriel.com, shakeel.butt@linux.dev, alex@ghiti.fr, kas@kernel.org, baohua@kernel.org, dev.jain@arm.com, baolin.wang@linux.alibaba.com, npache@redhat.com, Liam.Howlett@oracle.com, ryan.roberts@arm.com, Vlastimil Babka , lance.yang@linux.dev, linux-kernel@vger.kernel.org, nphamcs@gmail.com, shikemeng@huaweicloud.com, kernel-team@meta.com References: <20260427100553.2754667-1-usama.arif@linux.dev> <20260427100553.2754667-2-usama.arif@linux.dev> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 4/27/26 12:01, Usama Arif wrote: > Add softleaf_to_pmd() as the PMD counterpart to softleaf_to_pte(), > completing the symmetry of the softleaf abstraction for page table > leaf entries. > > The upcoming PMD swap entry support needs to construct PMD entries > from swap entries. Converting existing swp_entry_to_pmd() callers > to softleaf_to_pmd() in a prep patch keeps the feature patches > focused on new functionality rather than mixing refactoring with > new code. > > Signed-off-by: Usama Arif > --- > include/linux/leafops.h | 20 ++++++++++++++++++++ > mm/huge_memory.c | 12 ++++++------ > 2 files changed, 26 insertions(+), 6 deletions(-) > > diff --git a/include/linux/leafops.h b/include/linux/leafops.h > index 992cd8bd8ed0..803d312437df 100644 > --- a/include/linux/leafops.h > +++ b/include/linux/leafops.h > @@ -108,6 +108,21 @@ static inline softleaf_t softleaf_from_pmd(pmd_t pmd) > return swp_entry(__swp_type(arch_entry), __swp_offset(arch_entry)); > } > > +/** > + * softleaf_to_pmd() - Obtain a PMD entry from a leaf entry. > + * @entry: Leaf entry. > + * > + * This generates an architecture-specific PMD entry that can be utilised to > + * encode the metadata the leaf entry encodes. > + * > + * Returns: Architecture-specific PMD entry encoding leaf entry. > + */ > +static inline pmd_t softleaf_to_pmd(softleaf_t entry) > +{ > + /* Temporary until swp_entry_t eliminated. */ > + return swp_entry_to_pmd(entry); > +} > + Yeah, just what we do for ptes. Acked-by: David Hildenbrand (Arm) -- Cheers, David