+ mm-use-page-private-instead-of-page-index-in-percpu.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: use page->private instead of page->index in percpu
has been added to the -mm mm-unstable branch.  Its filename is
     mm-use-page-private-instead-of-page-index-in-percpu.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-use-page-private-instead-of-page-index-in-percpu.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: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm: use page->private instead of page->index in percpu
Date: Tue, 23 Jul 2024 16:35:01 +0100

The percpu allocator only uses one field in struct page, just change
it from page->index to page->private.

Link: https://lkml.kernel.org/r/20240723153503.1669586-7-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/percpu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/percpu.c~mm-use-page-private-instead-of-page-index-in-percpu
+++ a/mm/percpu.c
@@ -253,13 +253,13 @@ static int pcpu_chunk_slot(const struct
 /* set the pointer to a chunk in a page struct */
 static void pcpu_set_page_chunk(struct page *page, struct pcpu_chunk *pcpu)
 {
-	page->index = (unsigned long)pcpu;
+	page->private = (unsigned long)pcpu;
 }
 
 /* obtain pointer to a chunk from a page struct */
 static struct pcpu_chunk *pcpu_get_page_chunk(struct page *page)
 {
-	return (struct pcpu_chunk *)page->index;
+	return (struct pcpu_chunk *)page->private;
 }
 
 static int __maybe_unused pcpu_page_idx(unsigned int cpu, int page_idx)
_

Patches currently in -mm which might be from willy@infradead.org are

bootmem-stop-using-page-index.patch
mm-constify-page_address_in_vma.patch
mm-convert-page_to_pgoff-to-page_pgoff.patch
mm-mass-constification-of-folio-page-pointers.patch
mm-remove-references-to-page-index-in-huge_memoryc.patch
mm-use-page-private-instead-of-page-index-in-percpu.patch