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 10A7B1FBEA2 for ; Mon, 17 Nov 2025 01:31:34 +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=1763343095; cv=none; b=ENkC2kfCnCi93mBi7Z8Fxv3bdB1dCgP1OY0ylp1L3fMcr8A6Dhi2TdpWHjdIm4GZzOGI699WtRHfSDnvh9G40R7tKYBfRTLN/iVuO7XezExLzOBip+CrTtR8+CAA1o3smdibv3gTKTOA0xMpN7ZNguwgsCdm/V4fkDaL1K/w2KY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763343095; c=relaxed/simple; bh=ICbgfAvAo/QesoAJ9ECz/1isv2i1Wnjpj5/Ecn4NIjA=; h=Date:To:From:Subject:Message-Id; b=TsEjavu4rt3skDP5pLxN2CBGb8pDtm65Tq1AtdSnpCYT9Gy8VyLriqVkwx227uh/4rZ/zWoERUx9yvlt8tDmmpjjTrXpOTdt6wFB8O2AGTLwmC0ZZHUAaGOzziAmJRfQznvAlw2UeaMTR/6HctMqInjyGBOcZxPhpaC990SUzRg= 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=qbeVPwt+; 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="qbeVPwt+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B101C4CEF1; Mon, 17 Nov 2025 01:31:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1763343094; bh=ICbgfAvAo/QesoAJ9ECz/1isv2i1Wnjpj5/Ecn4NIjA=; h=Date:To:From:Subject:From; b=qbeVPwt+v6d61vxdX0kMY2kbooRc4Pkk8yT5q/KutI/kKic6bexYL6Pds4+mUq8Q2 1jkzeFVbWYSc17kvdR8Z+sE5t3AbY99GMZ/1I1wb4orjDqZjydivxUp6bvDzwPdKp8 aK2CZyi2hd+saUpS0oSDY3pcXn7STR4rejO8hy14= Date: Sun, 16 Nov 2025 17:31:33 -0800 To: mm-commits@vger.kernel.org,richard.weiyang@gmail.com,lance.yang@linux.dev,dev.jain@arm.com,david@redhat.com,anshuman.khandual@arm.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-replace-read_once-with-standard-page-table-accessors.patch removed from -mm tree Message-Id: <20251117013134.7B101C4CEF1@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: replace READ_ONCE() with standard page table accessors has been removed from the -mm tree. Its filename was mm-replace-read_once-with-standard-page-table-accessors.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: Anshuman Khandual Subject: mm: replace READ_ONCE() with standard page table accessors Date: Tue, 7 Oct 2025 07:31:00 +0100 Replace all READ_ONCE() with a standard page table accessors i.e pxdp_get() that defaults into READ_ONCE() in cases where platform does not override. Link: https://lkml.kernel.org/r/20251007063100.2396936-1-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: David Hildenbrand Reviewed-by: Lance Yang Reviewed-by: Wei Yang Reviewed-by: Dev Jain Signed-off-by: Andrew Morton --- mm/gup.c | 10 +++++----- mm/hmm.c | 2 +- mm/memory.c | 4 ++-- mm/mprotect.c | 2 +- mm/sparse-vmemmap.c | 2 +- mm/vmscan.c | 2 +- 6 files changed, 11 insertions(+), 11 deletions(-) --- a/mm/gup.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/gup.c @@ -950,7 +950,7 @@ static struct page *follow_pud_mask(stru struct mm_struct *mm = vma->vm_mm; pudp = pud_offset(p4dp, address); - pud = READ_ONCE(*pudp); + pud = pudp_get(pudp); if (!pud_present(pud)) return no_page_table(vma, flags, address); if (pud_leaf(pud)) { @@ -975,7 +975,7 @@ static struct page *follow_p4d_mask(stru p4d_t *p4dp, p4d; p4dp = p4d_offset(pgdp, address); - p4d = READ_ONCE(*p4dp); + p4d = p4dp_get(p4dp); BUILD_BUG_ON(p4d_leaf(p4d)); if (!p4d_present(p4d) || p4d_bad(p4d)) @@ -3060,7 +3060,7 @@ static int gup_fast_pud_range(p4d_t *p4d pudp = pud_offset_lockless(p4dp, p4d, addr); do { - pud_t pud = READ_ONCE(*pudp); + pud_t pud = pudp_get(pudp); next = pud_addr_end(addr, end); if (unlikely(!pud_present(pud))) @@ -3086,7 +3086,7 @@ static int gup_fast_p4d_range(pgd_t *pgd p4dp = p4d_offset_lockless(pgdp, pgd, addr); do { - p4d_t p4d = READ_ONCE(*p4dp); + p4d_t p4d = p4dp_get(p4dp); next = p4d_addr_end(addr, end); if (!p4d_present(p4d)) @@ -3108,7 +3108,7 @@ static void gup_fast_pgd_range(unsigned pgdp = pgd_offset(current->mm, addr); do { - pgd_t pgd = READ_ONCE(*pgdp); + pgd_t pgd = pgdp_get(pgdp); next = pgd_addr_end(addr, end); if (pgd_none(pgd)) --- a/mm/hmm.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/hmm.c @@ -491,7 +491,7 @@ static int hmm_vma_walk_pud(pud_t *pudp, /* Normally we don't want to split the huge page */ walk->action = ACTION_CONTINUE; - pud = READ_ONCE(*pudp); + pud = pudp_get(pudp); if (!pud_present(pud)) { spin_unlock(ptl); return hmm_vma_walk_hole(start, end, -1, walk); --- a/mm/memory.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/memory.c @@ -6690,12 +6690,12 @@ retry: goto out; p4dp = p4d_offset(pgdp, address); - p4d = READ_ONCE(*p4dp); + p4d = p4dp_get(p4dp); if (p4d_none(p4d) || unlikely(p4d_bad(p4d))) goto out; pudp = pud_offset(p4dp, address); - pud = READ_ONCE(*pudp); + pud = pudp_get(pudp); if (pud_none(pud)) goto out; if (pud_leaf(pud)) { --- a/mm/mprotect.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/mprotect.c @@ -599,7 +599,7 @@ again: break; } - pud = READ_ONCE(*pudp); + pud = pudp_get(pudp); if (pud_none(pud)) continue; --- a/mm/sparse-vmemmap.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/sparse-vmemmap.c @@ -439,7 +439,7 @@ int __meminit vmemmap_populate_hugepages return -ENOMEM; pmd = pmd_offset(pud, addr); - if (pmd_none(READ_ONCE(*pmd))) { + if (pmd_none(pmdp_get(pmd))) { void *p; p = vmemmap_alloc_block_buf(PMD_SIZE, node, altmap); --- a/mm/vmscan.c~mm-replace-read_once-with-standard-page-table-accessors +++ a/mm/vmscan.c @@ -3773,7 +3773,7 @@ static int walk_pud_range(p4d_t *p4d, un pud = pud_offset(p4d, start & P4D_MASK); restart: for (i = pud_index(start), addr = start; addr != end; i++, addr = next) { - pud_t val = READ_ONCE(pud[i]); + pud_t val = pudp_get(pud + i); next = pud_addr_end(addr, end); _ Patches currently in -mm which might be from anshuman.khandual@arm.com are