The quilt patch titled
Subject: mm: remove head_compound_mapcount() and _ptr functions
has been removed from the -mm tree. Its filename was
mm-remove-head_compound_mapcount-and-_ptr-functions.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: remove head_compound_mapcount() and _ptr functions
Date: Wed, 11 Jan 2023 14:29:01 +0000
folio_mapcount_ptr(), compound_mapcount_ptr() and subpages_mapcount_ptr()
are all now unused.
Link: https://lkml.kernel.org/r/20230111142915.1001531-16-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/mm.h~mm-remove-head_compound_mapcount-and-_ptr-functions
+++ a/include/linux/mm.h
@@ -831,16 +831,7 @@ static inline int is_vmalloc_or_module_a
static inline int folio_entire_mapcount(struct folio *folio)
{
VM_BUG_ON_FOLIO(!folio_test_large(folio), folio);
- return atomic_read(folio_mapcount_ptr(folio)) + 1;
-}
-
-/*
- * Mapcount of compound page as a whole, does not include mapped sub-pages.
- * Must be called only on head of compound page.
- */
-static inline int head_compound_mapcount(struct page *head)
-{
- return atomic_read(compound_mapcount_ptr(head)) + 1;
+ return atomic_read(&folio->_entire_mapcount) + 1;
}
/*
@@ -905,11 +896,11 @@ static inline int total_mapcount(struct
static inline bool folio_large_is_mapped(struct folio *folio)
{
/*
- * Reading folio_mapcount_ptr() below could be omitted if hugetlb
+ * Reading _entire_mapcount below could be omitted if hugetlb
* participated in incrementing nr_pages_mapped when compound mapped.
*/
return atomic_read(&folio->_nr_pages_mapped) > 0 ||
- atomic_read(folio_mapcount_ptr(folio)) >= 0;
+ atomic_read(&folio->_entire_mapcount) >= 0;
}
/**
--- a/include/linux/mm_types.h~mm-remove-head_compound_mapcount-and-_ptr-functions
+++ a/include/linux/mm_types.h
@@ -421,22 +421,6 @@ FOLIO_MATCH(hugetlb_cgroup_rsvd, _hugetl
FOLIO_MATCH(hugetlb_hwpoison, _hugetlb_hwpoison);
#undef FOLIO_MATCH
-static inline atomic_t *folio_mapcount_ptr(struct folio *folio)
-{
- struct page *tail = &folio->page + 1;
- return &tail->compound_mapcount;
-}
-
-static inline atomic_t *compound_mapcount_ptr(struct page *page)
-{
- return &page[1].compound_mapcount;
-}
-
-static inline atomic_t *subpages_mapcount_ptr(struct page *page)
-{
- return &page[1].subpages_mapcount;
-}
-
/*
* Used for sizing the vmemmap region on some architectures
*/
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
