From nobody Wed Dec 17 22:42:29 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2CBC71C8631; Thu, 13 Mar 2025 18:15:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741889752; cv=none; b=qiqyUwyqpbgMi7dGxlJy2cSgVRSZsLb3ys5dEafkDHEXI1aEDsCXvE8P6OPKtVmJUeo9O6R+ZxYuOekWj8Tib2MGCuAxj+w0r8kG+XFcZRvFZmK8bjcaX/aGmjj2LxTZlgRDcxuk9IjKW9tzPjY6jsPbA57PbiJHW36+3Wjw6To= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741889752; c=relaxed/simple; bh=790nIjekPGYAliGPAZRKB2moAt8x9SJMIpb1bPx7iVE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=PJWwCGnQSXMGKhJJwIuNn6T5oMqFne8xthx3C4kUviwKqT18C+j9DssopQPIfBg9OKRVYz5qUoyZ8fYCHC4msVdH7ALfrt8CRAz/ECCDfkosyDcBD7BAMoCZBU0JpqDFellBre7pDpe3qGI/gyVpQ6YrlqWXGJ+HfD/abeGz+V4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 07FEE12FC; Thu, 13 Mar 2025 11:16:01 -0700 (PDT) Received: from K4MQJ0H1H2.arm.com (unknown [10.163.42.238]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AE5113F694; Thu, 13 Mar 2025 11:15:45 -0700 (PDT) From: Dev Jain To: jroedel@suse.de, akpm@linux-foundation.org Cc: ryan.roberts@arm.com, david@redhat.com, willy@infradead.org, hch@lst.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dev Jain , stable@vger.kernel.org Subject: [PATCH] mm: Update mask post pxd_clear_bad() Date: Thu, 13 Mar 2025 23:44:14 +0530 Message-Id: <20250313181414.78512-1-dev.jain@arm.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) 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 Content-Type: text/plain; charset="utf-8" Since pxd_clear_bad() is an operation changing the state of the page tables, we should call arch_sync_kernel_mappings() post this. Fixes: e80d3909be42 ("mm: track page table modifications in __apply_to_page= _range()") Cc: Signed-off-by: Dev Jain --- mm/memory.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memory.c b/mm/memory.c index 78c7ee62795e..9a4a8c710be0 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2987,6 +2987,7 @@ static int apply_to_pmd_range(struct mm_struct *mm, p= ud_t *pud, if (!create) continue; pmd_clear_bad(pmd); + *mask =3D PGTBL_PMD_MODIFIED; } err =3D apply_to_pte_range(mm, pmd, addr, next, fn, data, create, mask); @@ -3023,6 +3024,7 @@ static int apply_to_pud_range(struct mm_struct *mm, p= 4d_t *p4d, if (!create) continue; pud_clear_bad(pud); + *mask =3D PGTBL_PUD_MODIFIED; } err =3D apply_to_pmd_range(mm, pud, addr, next, fn, data, create, mask); @@ -3059,6 +3061,7 @@ static int apply_to_p4d_range(struct mm_struct *mm, p= gd_t *pgd, if (!create) continue; p4d_clear_bad(p4d); + *mask =3D PGTBL_P4D_MODIFIED; } err =3D apply_to_pud_range(mm, p4d, addr, next, fn, data, create, mask); @@ -3095,6 +3098,7 @@ static int __apply_to_page_range(struct mm_struct *mm= , unsigned long addr, if (!create) continue; pgd_clear_bad(pgd); + mask =3D PGTBL_PGD_MODIFIED; } err =3D apply_to_p4d_range(mm, pgd, addr, next, fn, data, create, &mask); --=20 2.30.2