The patch titled
Subject: mm: remove PageWaiters, PageSetWaiters and PageClearWaiters
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-pagewaiters-pagesetwaiters-and-pageclearwaiters.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-pagewaiters-pagesetwaiters-and-pageclearwaiters.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@xxxxxxxxxxxxx>
Subject: mm: remove PageWaiters, PageSetWaiters and PageClearWaiters
Date: Tue, 27 Feb 2024 19:23:29 +0000
All callers have been converted to use folios. This was the only user of
PF_ONLY_HEAD, so remove that too.
Link: https://lkml.kernel.org/r/20240227192337.757313-3-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
--- a/include/linux/page-flags.h~mm-remove-pagewaiters-pagesetwaiters-and-pageclearwaiters
+++ a/include/linux/page-flags.h
@@ -328,9 +328,6 @@ static unsigned long *folio_flags(struct
* for compound page all operations related to the page flag applied to
* head page.
*
- * PF_ONLY_HEAD:
- * for compound page, callers only ever operate on the head page.
- *
* PF_NO_TAIL:
* modifications of the page flag must be done on small or head pages,
* checks can be done on tail pages too.
@@ -346,9 +343,6 @@ static unsigned long *folio_flags(struct
page; })
#define PF_ANY(page, enforce) PF_POISONED_CHECK(page)
#define PF_HEAD(page, enforce) PF_POISONED_CHECK(compound_head(page))
-#define PF_ONLY_HEAD(page, enforce) ({ \
- VM_BUG_ON_PGFLAGS(PageTail(page), page); \
- PF_POISONED_CHECK(page); })
#define PF_NO_TAIL(page, enforce) ({ \
VM_BUG_ON_PGFLAGS(enforce && PageTail(page), page); \
PF_POISONED_CHECK(compound_head(page)); })
@@ -362,7 +356,6 @@ static unsigned long *folio_flags(struct
/* Which page is the flag stored in */
#define FOLIO_PF_ANY 0
#define FOLIO_PF_HEAD 0
-#define FOLIO_PF_ONLY_HEAD 0
#define FOLIO_PF_NO_TAIL 0
#define FOLIO_PF_NO_COMPOUND 0
#define FOLIO_PF_SECOND 1
@@ -488,7 +481,7 @@ static inline int TestClearPage##uname(s
TESTSETFLAG_FALSE(uname, lname) TESTCLEARFLAG_FALSE(uname, lname)
__PAGEFLAG(Locked, locked, PF_NO_TAIL)
-PAGEFLAG(Waiters, waiters, PF_ONLY_HEAD)
+FOLIO_FLAG(waiters, FOLIO_HEAD_PAGE)
PAGEFLAG(Error, error, PF_NO_TAIL) TESTCLEARFLAG(Error, error, PF_NO_TAIL)
PAGEFLAG(Referenced, referenced, PF_HEAD)
TESTCLEARFLAG(Referenced, referenced, PF_HEAD)
@@ -1138,7 +1131,6 @@ static inline bool folio_has_private(str
#undef PF_ANY
#undef PF_HEAD
-#undef PF_ONLY_HEAD
#undef PF_NO_TAIL
#undef PF_NO_COMPOUND
#undef PF_SECOND
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-support-order-1-folios-in-the-page-cache.patch
mm-make-folios_put-the-basis-of-release_pages.patch
mm-convert-free_unref_page_list-to-use-folios.patch
mm-add-free_unref_folios.patch
mm-use-folios_put-in-__folio_batch_release.patch
memcg-add-mem_cgroup_uncharge_folios.patch
mm-remove-use-of-folio-list-from-folios_put.patch
mm-use-free_unref_folios-in-put_pages_list.patch
mm-use-__page_cache_release-in-folios_put.patch
mm-handle-large-folios-in-free_unref_folios.patch
mm-allow-non-hugetlb-large-folios-to-be-batch-processed.patch
mm-free-folios-in-a-batch-in-shrink_folio_list.patch
mm-free-folios-directly-in-move_folios_to_lru.patch
memcg-remove-mem_cgroup_uncharge_list.patch
mm-remove-free_unref_page_list.patch
mm-remove-lru_to_page.patch
mm-convert-free_pages_and_swap_cache-to-use-folios_put.patch
mm-use-a-folio-in-__collapse_huge_page_copy_succeeded.patch
mm-convert-free_swap_cache-to-take-a-folio.patch
mm-use-folio-more-widely-in-__split_huge_page.patch
mm-separate-out-folio_flags-from-pageflags.patch
mm-remove-pagewaiters-pagesetwaiters-and-pageclearwaiters.patch
mm-remove-pageyoung-and-pageidle-definitions.patch
mm-add-__dump_folio.patch
mm-make-dump_page-take-a-const-argument.patch
mm-constify-testing-page-folio-flags.patch
mm-constify-more-page-folio-tests.patch
mm-remove-cast-from-page_to_nid.patch
