[merged mm-stable] mm-remove-pg_error.patch removed from -mm tree

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The quilt patch titled
     Subject: mm: remove PG_error
has been removed from the -mm tree.  Its filename was
     mm-remove-pg_error.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 PG_error
Date: Wed, 7 Aug 2024 20:35:26 +0100

The PG_error bit is now unused; delete it and free up a bit in
page->flags.

Link: https://lkml.kernel.org/r/20240807193528.1865100-2-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/proc/page.c                         |    1 -
 include/linux/page-flags.h             |    6 +-----
 include/trace/events/mmflags.h         |    1 -
 include/uapi/linux/kernel-page-flags.h |    2 +-
 4 files changed, 2 insertions(+), 8 deletions(-)

--- a/fs/proc/page.c~mm-remove-pg_error
+++ a/fs/proc/page.c
@@ -182,7 +182,6 @@ u64 stable_page_flags(const struct page
 #endif
 
 	u |= kpf_copy_bit(k, KPF_LOCKED,	PG_locked);
-	u |= kpf_copy_bit(k, KPF_ERROR,		PG_error);
 	u |= kpf_copy_bit(k, KPF_DIRTY,		PG_dirty);
 	u |= kpf_copy_bit(k, KPF_UPTODATE,	PG_uptodate);
 	u |= kpf_copy_bit(k, KPF_WRITEBACK,	PG_writeback);
--- a/include/linux/page-flags.h~mm-remove-pg_error
+++ a/include/linux/page-flags.h
@@ -66,8 +66,6 @@
  * PG_referenced, PG_reclaim are used for page reclaim for anonymous and
  * file-backed pagecache (see mm/vmscan.c).
  *
- * PG_error is set to indicate that an I/O error occurred on this page.
- *
  * PG_arch_1 is an architecture specific page state bit.  The generic code
  * guarantees that this bit is cleared for a page when it first is entered into
  * the page cache.
@@ -103,7 +101,6 @@ enum pageflags {
 	PG_waiters,		/* Page has waiters, check its waitqueue. Must be bit #7 and in the same byte as "PG_locked" */
 	PG_active,
 	PG_workingset,
-	PG_error,
 	PG_owner_priv_1,	/* Owner use. If pagecache, fs may use*/
 	PG_arch_1,
 	PG_reserved,
@@ -183,7 +180,7 @@ enum pageflags {
 	 */
 
 	/* At least one page in this folio has the hwpoison flag set */
-	PG_has_hwpoisoned = PG_error,
+	PG_has_hwpoisoned = PG_active,
 	PG_large_rmappable = PG_workingset, /* anon or file-backed */
 };
 
@@ -506,7 +503,6 @@ static inline int TestClearPage##uname(s
 
 __PAGEFLAG(Locked, locked, PF_NO_TAIL)
 FOLIO_FLAG(waiters, FOLIO_HEAD_PAGE)
-PAGEFLAG(Error, error, PF_NO_TAIL) TESTCLEARFLAG(Error, error, PF_NO_TAIL)
 FOLIO_FLAG(referenced, FOLIO_HEAD_PAGE)
 	FOLIO_TEST_CLEAR_FLAG(referenced, FOLIO_HEAD_PAGE)
 	__FOLIO_SET_FLAG(referenced, FOLIO_HEAD_PAGE)
--- a/include/trace/events/mmflags.h~mm-remove-pg_error
+++ a/include/trace/events/mmflags.h
@@ -100,7 +100,6 @@
 #define __def_pageflag_names						\
 	DEF_PAGEFLAG_NAME(locked),					\
 	DEF_PAGEFLAG_NAME(waiters),					\
-	DEF_PAGEFLAG_NAME(error),					\
 	DEF_PAGEFLAG_NAME(referenced),					\
 	DEF_PAGEFLAG_NAME(uptodate),					\
 	DEF_PAGEFLAG_NAME(dirty),					\
--- a/include/uapi/linux/kernel-page-flags.h~mm-remove-pg_error
+++ a/include/uapi/linux/kernel-page-flags.h
@@ -7,7 +7,7 @@
  */
 
 #define KPF_LOCKED		0
-#define KPF_ERROR		1
+#define KPF_ERROR		1	/* Now unused */
 #define KPF_REFERENCED		2
 #define KPF_UPTODATE		3
 #define KPF_DIRTY		4
_

Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are

printf-remove-%pgt-support.patch
mm-introduce-page_mapcount_is_type.patch
mm-support-only-one-page_type-per-page.patch
zsmalloc-use-all-available-24-bits-of-page_type.patch
mm-remove-pageactive.patch
mm-remove-pageswapbacked.patch
mm-remove-pagereadahead.patch
mm-remove-pageswapcache.patch
mm-remove-pageunevictable.patch
mm-remove-pagemlocked.patch
mm-remove-pageownerpriv1.patch
mm-remove-page_has_private.patch
mm-rename-pg_mappedtodisk-to-pg_owner_2.patch
x86-remove-pg_uncached.patch
swap-convert-swapon-to-use-a-folio.patch





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