+ mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid.patch added to mm-unstable branch

+ mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/page_alloc: fix obsolete comment in deferred_pfn_valid()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/page_alloc: fix obsolete comment in deferred_pfn_valid()
Date: Fri, 16 Sep 2022 15:22:57 +0800

There are no architectures that can have holes in the memory map within a
pageblock since commit 859a85ddf90e ("mm: remove pfn_valid_within() and
CONFIG_HOLES_IN_ZONE").  Update the corresponding comment.

Link: https://lkml.kernel.org/r/20220916072257.9639-17-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/mm/page_alloc.c~mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid
+++ a/mm/page_alloc.c
@@ -1929,11 +1929,7 @@ static inline void __init pgdat_init_rep
 /*
  * Returns true if page needs to be initialized or freed to buddy allocator.
  *
- * First we check if pfn is valid on architectures where it is possible to have
- * holes within pageblock_nr_pages. On systems where it is not possible, this
- * function is optimized out.
- *
- * Then, we check if a current large page is valid by only checking the validity
+ * We check if a current large page is valid by only checking the validity
  * of the head pfn.
  */
 static inline bool __init deferred_pfn_valid(unsigned long pfn)
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
writeback-remove-unused-macro-dirty_full_scope.patch
mm-page_alloc-ensure-kswapd-doesnt-accidentally-go-to-sleep.patch
mm-page_alloc-make-zone_pcp_update-static.patch
mm-remove-obsolete-macro-nr_pcp_order_mask-and-nr_pcp_order_width.patch
mm-page_alloc-remove-obsolete-comment-in-zone_statistics.patch
mm-page_alloc-add-__init-annotations-to-init_mem_debugging_and_hardening.patch
mm-page_alloc-fix-freeing-static-percpu-memory.patch
mm-remove-obsolete-pgdat_is_empty.patch
mm-page_alloc-add-missing-is_migrate_isolate-check-in-set_page_guard.patch
mm-page_alloc-use-local-variable-zone_idx-directly.patch
mm-memory_hotplug-remove-obsolete-generic_free_nodedata.patch
mm-page_alloc-make-boot_nodestats-static.patch
mm-page_alloc-use-helper-macro-sz_1km.patch
mm-page_alloc-init-local-variable-buddy_pfn.patch
mm-page_alloc-use-costly_order-in-warn_on_once_gfp.patch
mm-page_alloc-remove-obsolete-gfpflags_normal_context.patch
mm-page_alloc-fix-obsolete-comment-in-deferred_pfn_valid.patch