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
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------------------------------------------------------
From: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
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@xxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202502020030.MnEJ847Z-lkp@xxxxxxxxx/
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Jaya Kumar <jayakumar.lkml@xxxxxxxxx>
Cc: Kajtar Zsolt <soci@xxxxxxxxxxxxx>
Cc: MaÃra Canal <mcanal@xxxxxxxxxx>
Cc: Mattew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx 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
