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 7DA8B38F9A for ; Tue, 25 Jun 2024 03:52:41 +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=1719287561; cv=none; b=VKt0HvRdp4sayRsINzEb2o3XVBa/ACwM6umyHTrlFwUkuYymjXaYxxVK8HzgXIt72Fn7KUhRAQ4CKzPwY/2+6VUv7VSev2jfEGTsh363tVzaZ4n3NFutUdXVV4FN3pLYHUyfaG/gAMQaQU9KmXdtQM+liaLBeEbKN1Zfmj5gCJE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719287561; c=relaxed/simple; bh=L/l453ScAZQ5nZef32ylAIhiGvq3D8o+QTZC2PAvXfA=; h=Date:To:From:Subject:Message-Id; b=giw4xWjfzFMNFdy9af5UavcFASTfdacJjLFI9l4XVOI17sW8SKdd7p6UY205xQp/8YIX/zt2/uTMtIzA6m32w6ljaSWmYKyc+bj6cnfbQhRRgsGAxJCvRpVlvWVJhcQZ9mw9M/NKt1UjHKjGf0oA2/bQ9ATnGGjpw84cXuCEV0Y= 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=Y9+CP7p3; 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="Y9+CP7p3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 431D6C32789; Tue, 25 Jun 2024 03:52:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1719287561; bh=L/l453ScAZQ5nZef32ylAIhiGvq3D8o+QTZC2PAvXfA=; h=Date:To:From:Subject:From; b=Y9+CP7p3U4mKVPqRNJvfrTTS8nnT2YAq9+pY8b+svJpZahKK7PHj8W7bw2ZlIyg6w l09r3Xfj0UigY7gHtndupoKrBqkaDeFsXL7P+rMAxGi9P7tG5/jU5HkNZ4c5ogjnoA j0SnreObVfIo8J9zcH7ksWpuIUwQA0Ti1DCSsj/0= Date: Mon, 24 Jun 2024 20:52:40 -0700 To: mm-commits@vger.kernel.org,willy@infradead.org,vishal.moola@gmail.com,vbabka@suse.cz,osandov@osandov.com,gehao@kylinos.cn,david@redhat.com,stephen.s.brennan@oracle.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-hotfixes-stable] mm-convert-page-type-macros-to-enum.patch removed from -mm tree Message-Id: <20240625035241.431D6C32789@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: convert page type macros to enum has been removed from the -mm tree. Its filename was mm-convert-page-type-macros-to-enum.patch This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Stephen Brennan Subject: mm: convert page type macros to enum Date: Fri, 7 Jun 2024 13:29:53 -0700 Changing PG_slab from a page flag to a page type in commit 46df8e73a4a3 ("mm: free up PG_slab") in has the unintended consequence of removing the PG_slab constant from kernel debuginfo. The commit does add the value to the vmcoreinfo note, which allows debuggers to find the value without hardcoding it. However it's most flexible to continue representing the constant with an enum. To that end, convert the page type fields into an enum. Debuggers will now be able to detect that PG_slab's type has changed from enum pageflags to enum pagetype. Link: https://lkml.kernel.org/r/20240607202954.1198180-1-stephen.s.brennan@oracle.com Fixes: 46df8e73a4a3 ("mm: free up PG_slab") Signed-off-by: Stephen Brennan Acked-by: Vlastimil Babka Cc: David Hildenbrand Cc: Hao Ge Cc: Matthew Wilcox (Oracle) Cc: Omar Sandoval Cc: Vishal Moola (Oracle) Signed-off-by: Andrew Morton --- include/linux/page-flags.h | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) --- a/include/linux/page-flags.h~mm-convert-page-type-macros-to-enum +++ a/include/linux/page-flags.h @@ -944,15 +944,18 @@ PAGEFLAG_FALSE(HasHWPoisoned, has_hwpois * mistaken for a page type value. */ -#define PAGE_TYPE_BASE 0xf0000000 -/* Reserve 0x0000007f to catch underflows of _mapcount */ -#define PAGE_MAPCOUNT_RESERVE -128 -#define PG_buddy 0x00000080 -#define PG_offline 0x00000100 -#define PG_table 0x00000200 -#define PG_guard 0x00000400 -#define PG_hugetlb 0x00000800 -#define PG_slab 0x00001000 +enum pagetype { + PG_buddy = 0x00000080, + PG_offline = 0x00000100, + PG_table = 0x00000200, + PG_guard = 0x00000400, + PG_hugetlb = 0x00000800, + PG_slab = 0x00001000, + + PAGE_TYPE_BASE = 0xf0000000, + /* Reserve 0x0000007f to catch underflows of _mapcount */ + PAGE_MAPCOUNT_RESERVE = -128, +}; #define PageType(page, flag) \ ((page->page_type & (PAGE_TYPE_BASE | flag)) == PAGE_TYPE_BASE) _ Patches currently in -mm which might be from stephen.s.brennan@oracle.com are