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 69789301460 for ; Sat, 28 Feb 2026 21:49:10 +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=1772315351; cv=none; b=BlNLZ5Vrfkavc+dIcrDyTKsgEXtHPQUuuWw0Xl2rjJLsjkZyRkOW+kfzK/2CGFOygXl+uXem86hljmwe4bZ79blEYRabhj2EPhb5f8BHkLt8vl2EZNN4Y1i4nf8y0VVpkKU/ESckF5dQB1mr8LTxMWDuqAZ2Chm2O3tOtV7z8T4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772315351; c=relaxed/simple; bh=d2hb0JkUThYZdl+OlCkxHedo9Wi/IKfVoiJxLbJjLhQ=; h=Date:To:From:Subject:Message-Id; b=C0kesdl/ASZt56CLd7IMmXjA2FrifHvVJJZzyjPx1NT/Ftnx+11GeBR+Wwx3yFV1+1jRYASDqQ+PL24Vrcs+ofN/xjCsLgJ5Q1z4pIfCJ9pj4yR5JMvWvWMMNFEnRWyfVHg5hhH2Smx7rp/hm0MhwfA6iiGQEwlHRE5hh2LT7Bc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=QdLyqaOE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="QdLyqaOE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2FABC116D0; Sat, 28 Feb 2026 21:49:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1772315350; bh=d2hb0JkUThYZdl+OlCkxHedo9Wi/IKfVoiJxLbJjLhQ=; h=Date:To:From:Subject:From; b=QdLyqaOEP2i58BIA8kOvrw91YYwBjpaNbZvQjXwguQ2MsWyRUwuw40eoS/4Gt5bPC Gs+8514H8josHUD3uDmxZBJw++y3wbpEeWB0czJ92l4HSnfyRiR2WVc31kI+5nMbDV kDUr5gLuNgK7c0phN0uiYRmnlNeMMATvhdeQN+1U= Date: Sat, 28 Feb 2026 13:49:10 -0800 To: mm-commits@vger.kernel.org,sj@kernel.org,rppt@kernel.org,lorenzo.stoakes@oracle.com,david@kernel.org,anshuman.khandual@arm.com,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-replace-read_once-in-pud_trans_unstable.patch added to mm-new branch Message-Id: <20260228214910.B2FABC116D0@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm: replace READ_ONCE() in pud_trans_unstable() has been added to the -mm mm-new branch. Its filename is mm-replace-read_once-in-pud_trans_unstable.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-replace-read_once-in-pud_trans_unstable.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Anshuman Khandual Subject: mm: replace READ_ONCE() in pud_trans_unstable() Date: Fri, 27 Feb 2026 04:03:00 +0000 Replace READ_ONCE() with the existing standard page table accessor for PUD aka pudp_get() in pud_trans_unstable(). This does not create any functional change for platforms that do not override pudp_get(), which still defaults to READ_ONCE(). Link: https://lkml.kernel.org/r/20260227040300.2091901-1-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: David Hildenbrand (Arm) Acked-by: SeongJae Park Cc: Lorenzo Stoakes Cc: Mike Rapoport Signed-off-by: Andrew Morton --- include/linux/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/pgtable.h~mm-replace-read_once-in-pud_trans_unstable +++ a/include/linux/pgtable.h @@ -2042,7 +2042,7 @@ static inline int pud_trans_unstable(pud { #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && \ defined(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) - pud_t pudval = READ_ONCE(*pud); + pud_t pudval = pudp_get(pud); if (pud_none(pudval) || pud_trans_huge(pudval)) return 1; _ Patches currently in -mm which might be from anshuman.khandual@arm.com are mm-debug_vm_pgtable-replace-write_once-with-pxd_clear.patch mm-replace-read_once-in-pud_trans_unstable.patch