+ fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch added to mm-unstable branch

+ fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch added to mm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix
has been added to the -mm mm-unstable branch.  Its filename is
     fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

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

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix
Date: Thu Feb  6 07:40:04 PM PST 2025

fix fb_err() call

Cc: David Hildenbrand <david@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: Kajtar Zsolt <soci@c64.rulez.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Maíra Canal <mcanal@igalia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Simona Vetter <simona.vetter@ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/video/fbdev/core/fb_defio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/video/fbdev/core/fb_defio.c~fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix
+++ a/drivers/video/fbdev/core/fb_defio.c
@@ -133,7 +133,7 @@ static vm_fault_t fb_deferred_io_fault(s
 		return VM_FAULT_SIGBUS;
 
 	if (!vmf->vma->vm_file)
-		fb_err("no mapping available\n");
+		fb_err(info, "no mapping available\n");
 
 	BUG_ON(!info->fbdefio->mapping);
 
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

mm-vmscan-extract-calculated-pressure-balance-as-a-function-fix.patch
mm-madvise-remove-redundant-mmap_lock-operations-from-process_madvise-fix.patch
fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch
lib-plistc-add-shortcut-for-plist_requeue-fix.patch

+ fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch added to mm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: mm: fixup unused variable warnings
has been added to the -mm mm-unstable branch.  Its filename is
     fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

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

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: mm: fixup unused variable warnings
Date: Sun, 9 Feb 2025 06:29:25 +0000

Unfortunately fb_defio being enabled by nommu devices seems enormously
ingrained in the kernel to the point that it's not feasible to address
that in this series, so we use an ifdef to workaround.

However this workaround unfortunately missed some unused variables -
correct this.

This has been tested locally with W=1 and confirmed to resolve the issue.

Link: https://lkml.kernel.org/r/d4018405-2762-4385-a816-e54cc23839ac@lucifer.local
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: Kajtar Zsolt <soci@c64.rulez.org>
Cc: Maíra Canal <mcanal@igalia.com>
Cc: Mattew Wilcox <willy@infradead.org>
Cc: Simona Vetter <simona.vetter@ffwll.ch>
Cc: Thomas Zimemrmann <tzimmermann@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/video/fbdev/core/fb_defio.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/video/fbdev/core/fb_defio.c~fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix
+++ a/drivers/video/fbdev/core/fb_defio.c
@@ -265,15 +265,15 @@ static void fb_deferred_io_work(struct w
 
 	/* here we wrprotect the page's mappings, then do all deferred IO. */
 	mutex_lock(&fbdefio->lock);
+#ifdef CONFIG_MMU
 	list_for_each_entry(pageref, &fbdefio->pagereflist, list) {
 		struct page *page = pageref->page;
 		pgoff_t pgoff = pageref->offset >> PAGE_SHIFT;
 
-#ifdef CONFIG_MMU
 		mapping_wrprotect_range(fbdefio->mapping, pgoff,
 					page_to_pfn(page), 1);
-#endif
 	}
+#endif
 
 	/* driver's callback with pagereflist */
 	fbdefio->deferred_io(info, &fbdefio->pagereflist);
_

Patches currently in -mm which might be from lorenzo.stoakes@oracle.com are

mm-simplify-vma-merge-structure-and-expand-comments.patch
mm-further-refactor-commit_merge.patch
mm-eliminate-adj_start-parameter-from-commit_merge.patch
mm-make-vmg-target-consistent-and-further-simplify-commit_merge.patch
mm-completely-abstract-unnecessary-adj_start-calculation.patch
mm-use-read-write_once-for-vma-vm_flags-on-migrate-mprotect.patch
mm-refactor-rmap_walk_file-to-separate-out-traversal-logic.patch
mm-provide-mapping_wrprotect_range-function.patch
fb_defio-do-not-use-deprecated-page-mapping-index-fields.patch
fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

+ fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch added to mm-unstable branch

[Andrew Morton]

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The patch titled
     Subject: fbdev: have CONFIG_FB_DEFERRED_IO depend on CONFIG_MMU
has been added to the -mm mm-unstable branch.  Its filename is
     fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch

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

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: fbdev: have CONFIG_FB_DEFERRED_IO depend on CONFIG_MMU
Date: Sat, 1 Feb 2025 16:56:02 +0000

Frame buffer deferred I/O is entirely reliant on the page faulting
mechanism (and thus, an MMU) to function.

Express this dependency in the Kconfig, as otherwise randconfig could
generate invalid configurations resulting in build errors.

Link: https://lkml.kernel.org/r/e38046bc-fa35-4f4d-b0e8-00ac4637c725@lucifer.local
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502020030.MnEJ847Z-lkp@intel.com/
Cc: David Hildenbrand <david@redhat.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jaya Kumar <jayakumar.lkml@gmail.com>
Cc: Kajtar Zsolt <soci@c64.rulez.org>
Cc: Maíra Canal <mcanal@igalia.com>
Cc: Mattew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/video/fbdev/core/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/video/fbdev/core/Kconfig~fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix
+++ a/drivers/video/fbdev/core/Kconfig
@@ -135,6 +135,7 @@ config FB_SYSMEM_FOPS
 config FB_DEFERRED_IO
 	bool
 	depends on FB_CORE
+	depends on MMU
 
 config FB_DMAMEM_HELPERS
 	bool
_

Patches currently in -mm which might be from lorenzo.stoakes@oracle.com are

mm-refactor-rmap_walk_file-to-separate-out-traversal-logic.patch
mm-provide-mapping_wrprotect_page-function.patch
fb_defio-do-not-use-deprecated-page-mapping-index-fields.patch
fb_defio-do-not-use-deprecated-page-mapping-index-fields-fix.patch
mm-simplify-vma-merge-structure-and-expand-comments.patch
mm-further-refactor-commit_merge.patch
mm-eliminate-adj_start-parameter-from-commit_merge.patch
mm-make-vmg-target-consistent-and-further-simplify-commit_merge.patch
mm-completely-abstract-unnecessary-adj_start-calculation.patch