From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 640074EBAC5 for ; Wed, 16 Sep 2026 21:54:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789595688; cv=none; b=ggIJHpgeit8qj0mdRjeq2p5vCymLoAoOpIdj4xVDuXZpVBfFvZeZqV9jp85JXMuaNAnxM97KbWG7onOZFq6EHUlPT3Ta1jISDkmIEzOjv9UVKy5V+2uALweeX2fRWsO826icqdLIW+FFr9Uis7UunxvUui1pTPh8Z42gfED4GOg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789595688; c=relaxed/simple; bh=ytTVIwVFp35HvShf4apJ9T9S0luTM0ntnJ4GE3FsrL0=; h=Date:To:From:Subject:Message-Id; b=D9Qe720kxzGoi1LtNjU2CaiD6k7D8+a1RWICbjW1Ek56334BnHNpAEA7IaKw1D09N9rfIqrgOzATnVRP+d2DVJsp+gzxYP/RDkX0/ILzzu5fslZ6K+2t2blm/q6mHbHy26n+5vHimDub71ZyTIIeOjvAjP/xBCukvxKhQLL3b6I= 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=Ya15fU9l; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="Ya15fU9l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98D021F00899; Wed, 16 Sep 2026 21:54:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789595681; bh=+CKQfw82plyG9EXAR7gyGbK32vyyb1FxHEmX9BR3WJ0=; h=Date:To:From:Subject; b=Ya15fU9l6CWQUAoZGcUa1nFdWrikzDPR1hiupooEHbxf9KXiozxVOT02YcYkCC+Dj kCSUMpUgCFw87bG1dsydkgZSg+AnbqGe5KLAfYgtS1f+r3eJz8XNfCBSHkbiH03v+Q jQARxGmiLj0dl3pkcaBCNPZoMwSpAaV/75fEJFd8= Date: Wed, 16 Sep 2026 14:54:41 -0700 To: mm-commits@vger.kernel.org,tz2294@columbia.edu,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.patch added to mm-new branch Message-Id: <20260916215441.98D021F00899@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/page_io: take a const folio in bio_associate_blkg_from_folio() has been added to the -mm mm-new branch. Its filename is mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.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 If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is 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: Tal Zussman Subject: mm/page_io: take a const folio in bio_associate_blkg_from_folio() Date: Tue, 15 Sep 2026 19:20:08 -0400 bio_associate_blkg_from_folio() and its helpers only read from the folio. Constify their folio arguments. Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-4-c239a6010b58@columbia.edu Signed-off-by: Tal Zussman Signed-off-by: Andrew Morton Reviewed-by: Muchun Song Acked-by: Shakeel Butt Acked-by: Lorenzo Stoakes (ARM) Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: Barry Song Cc: Chris Li Cc: David Hildenbrand Cc: Johannes Weiner Cc: Kairui Song Cc: Kemeng Shi Cc: Liam R. Howlett Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Nhat Pham Cc: Roman Gushchin Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Wei Xu Cc: Yuanchu Xie --- mm/page_io.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) --- a/mm/page_io.c~mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio +++ a/mm/page_io.c @@ -256,12 +256,13 @@ out_unlock: } #if defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP) -static struct cgroup_subsys_state *folio_memcg_blkg_css(struct folio *folio) +static struct cgroup_subsys_state *folio_memcg_blkg_css(const struct folio *folio) { return cgroup_e_css(folio_memcg(folio)->css.cgroup, &io_cgrp_subsys); } -static bool folio_blkg_can_merge(struct folio *folio, struct folio *prev_folio) +static bool folio_blkg_can_merge(const struct folio *folio, + const struct folio *prev_folio) { bool can_merge = true; @@ -277,7 +278,8 @@ static bool folio_blkg_can_merge(struct return can_merge; } -static void bio_associate_blkg_from_folio(struct bio *bio, struct folio *folio) +static void bio_associate_blkg_from_folio(struct bio *bio, + const struct folio *folio) { struct cgroup_subsys_state *css; @@ -294,11 +296,13 @@ static void bio_associate_blkg_from_foli css_put(css); } #else -static bool folio_blkg_can_merge(struct folio *folio, struct folio *prev_folio) +static bool folio_blkg_can_merge(const struct folio *folio, + const struct folio *prev_folio) { return true; } -static void bio_associate_blkg_from_folio(struct bio *bio, struct folio *folio) +static void bio_associate_blkg_from_folio(struct bio *bio, + const struct folio *folio) { } #endif /* CONFIG_MEMCG && CONFIG_BLK_CGROUP */ _ Patches currently in -mm which might be from tz2294@columbia.edu are mm-page_io-convert-write-completion-handlers-to-folios.patch mm-remove-pagereclaim.patch mm-page_io-use-swap-entries-directly-in-zeromap-helpers.patch mm-page_io-rename-bio_associate_blkg_from_page.patch mm-page_io-refer-to-folios-in-swap_writeout-comments.patch mm-swap-rename-__swap_writepage-to-__swap_writeout.patch mm-remove-unused-mark_page_reserved.patch mm-remove-unused-totalram_pages_inc-and-totalram_pages_dec.patch mm-remove-pagewriteback.patch mm-swap-add-folio_swap_entry-and-folio_page_swap_entry.patch mm-swap-add-folio_swap_entry-and-folio_page_swap_entry-fix.patch mm-huge_memory-add-a-comment-to-the-open-coded-swap-entry.patch mm-rmap-use-folio_page_swap_entry-in-ttu_anon_swapbacked_folio.patch mm-zswap-use-folio_swap_entry-in-zswap_store_page.patch mm-swapfile-use-folio_page_swap_entry.patch arm64-mte-make-mte_save_tags-and-mte_restore_tags-static.patch arm64-mte-pass-the-swap-entry-to-mte_save_tags.patch mm-swap-remove-page_swap_entry.patch mm-memcontrol-take-a-const-folio-in-folio_memcg-and-friends.patch mm-memcontrol-constify-obj_cgroup_memcg-and-friends.patch mm-memcontrol-constify-the-lruvec-helpers.patch mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.patch mm-memcontrol-constify-the-mem_cgroup-accessors.patch mm-page_counter-constify-page_counter_read-and-page_counter_margin.patch mm-memcontrol-constify-the-reclaim-protection-helpers.patch mm-memcontrol-constify-the-memcg-and-lruvec-stat-readers.patch mm-memcontrol-constify-the-swap-accounting-helpers.patch mm-memcontrol-constify-mem_cgroup_swappiness-and-mem_cgroup_get_max.patch mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers.patch