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 285C1227599 for ; Mon, 17 Nov 2025 01:33:38 +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=1763343218; cv=none; b=CLjHFCav6lfcVyipwmOZJHNF1ywN6u4mtW+kja0+H1KtYi2e+APLVcUSq1V4UhL3Y2ZoJA5jMbEIt77d7lRjqPcQ0UgceTGw5nHrz4OnDkR+PpXu6upuA1fY2JhBrl7fgjefMa/467gURIH3+wHF2cSYYaRWMuJBY6g9BT1Qujg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343218; c=relaxed/simple; bh=ODvBM3OGMJjBDYk0Mj5/kHFWuoPkUr4ToYCs1G674DI=; h=Date:To:From:Subject:Message-Id; b=UZbx1kiJwca3PCERMARehTr3Zd2BzC0vbBCt/FHYpq5avchoDA8/Bh2MKjOChYiycq4d6o5uUBZMQz1dwhhWxPBGY7CVVO3tgpUzLVUTlZA7+D97jCXykMm+P0ru86TlDoasDrDcjSIOSsi/KzIG5wPD/lAm+OygrG8geZ5Ef2A= 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=zuYNgluO; 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="zuYNgluO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E003CC113D0; Mon, 17 Nov 2025 01:33:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763343218; bh=ODvBM3OGMJjBDYk0Mj5/kHFWuoPkUr4ToYCs1G674DI=; h=Date:To:From:Subject:From; b=zuYNgluOI6uJVvFbOgha4bMhM4nJzEi51RuXxAaFQSyHn7LAMwkFPiMXSQNH0xJG/ Di6MI3vMtyjVwg6Kq25w4cZ/6fqm5Z+ruIIl7lhB3aL5ER6/Q5/uAmF92/akvmM1UZ EYhOaBvBGSS++w2oXIPZZCUzMJZzlfVJ/6yi5yKs= Date: Sun, 16 Nov 2025 17:33:37 -0800 To: mm-commits@vger.kernel.org,yi1.lai@intel.com,willy@infradead.org,will@kernel.org,vinicius.gomes@intel.com,vbabka@suse.cz,vasant.hegde@amd.com,urezki@gmail.com,tglx@linutronix.de,rppt@kernel.org,robin.murphy@arm.com,peterz@infradead.org,mingo@redhat.com,mhocko@kernel.org,luto@kernel.org,lorenzo.stoakes@oracle.com,liam.howlett@oracle.com,kevin.tian@intel.com,joro@8bytes.org,jgg@nvidia.com,jean-philippe@linaro.org,jannh@google.com,david@redhat.com,bp@alien8.de,baolu.lu@linux.intel.com,apopple@nvidia.com,dave.hansen@linux.intel.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] x86-mm-use-ptdesc-when-freeing-pmd-pages.patch removed from -mm tree Message-Id: <20251117013337.E003CC113D0@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: x86/mm: use 'ptdesc' when freeing PMD pages has been removed from the -mm tree. Its filename was x86-mm-use-ptdesc-when-freeing-pmd-pages.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Dave Hansen Subject: x86/mm: use 'ptdesc' when freeing PMD pages Date: Wed, 22 Oct 2025 16:26:30 +0800 There are a billion ways to refer to a physical memory address. One of the x86 PMD freeing code location chooses to use a 'pte_t *' to point to a PMD page and then call a PTE-specific freeing function for it. That's a bit wonky. Just use a 'struct ptdesc *' instead. Its entire purpose is to refer to page table pages. It also means being able to remove an explicit cast. Right now, pte_free_kernel() is a one-liner that calls pagetable_dtor_free(). Effectively, all this patch does is remove one superfluous __pa(__va(paddr)) conversion and then call pagetable_dtor_free() directly instead of through a helper. Link: https://lkml.kernel.org/r/20251022082635.2462433-5-baolu.lu@linux.intel.com Signed-off-by: Dave Hansen Signed-off-by: Lu Baolu Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Cc: Alistair Popple Cc: Andy Lutomirski Cc: Borislav Betkov Cc: David Hildenbrand Cc: Ingo Molnar Cc: Jann Horn Cc: Jean-Philippe Brucker Cc: Joerg Roedel Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport (Microsoft) Cc: Peter Zijlstra Cc: Robin Murohy Cc: Thomas Gleinxer Cc: "Uladzislau Rezki (Sony)" Cc: Vasant Hegde Cc: Vinicius Costa Gomes Cc: Vlastimil Babka Cc: Will Deacon Cc: Yi Lai Signed-off-by: Andrew Morton --- arch/x86/mm/pgtable.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/arch/x86/mm/pgtable.c~x86-mm-use-ptdesc-when-freeing-pmd-pages +++ a/arch/x86/mm/pgtable.c @@ -729,7 +729,7 @@ int pmd_clear_huge(pmd_t *pmd) int pud_free_pmd_page(pud_t *pud, unsigned long addr) { pmd_t *pmd, *pmd_sv; - pte_t *pte; + struct ptdesc *pt; int i; pmd = pud_pgtable(*pud); @@ -750,8 +750,8 @@ int pud_free_pmd_page(pud_t *pud, unsign for (i = 0; i < PTRS_PER_PMD; i++) { if (!pmd_none(pmd_sv[i])) { - pte = (pte_t *)pmd_page_vaddr(pmd_sv[i]); - pte_free_kernel(&init_mm, pte); + pt = page_ptdesc(pmd_page(pmd_sv[i])); + pagetable_dtor_free(pt); } } @@ -772,15 +772,15 @@ int pud_free_pmd_page(pud_t *pud, unsign */ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) { - pte_t *pte; + struct ptdesc *pt; - pte = (pte_t *)pmd_page_vaddr(*pmd); + pt = page_ptdesc(pmd_page(*pmd)); pmd_clear(pmd); /* INVLPG to clear all paging-structure caches */ flush_tlb_kernel_range(addr, addr + PAGE_SIZE-1); - pte_free_kernel(&init_mm, pte); + pagetable_dtor_free(pt); return 1; } _ Patches currently in -mm which might be from dave.hansen@linux.intel.com are