+ include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines.patch added to mm-new branch

+ include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: include/linux/pgtable.h: convert arch_enter_lazy_mmu_mode() and friends to static inlines
has been added to the -mm mm-new branch.  Its filename is
     include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines.patch

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

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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: include/linux/pgtable.h: convert arch_enter_lazy_mmu_mode() and friends to static inlines
Date: Sat Sep 13 05:03:39 PM PDT 2025

For all the usual reasons, plus a new one.  Calling

	(void)arch_enter_lazy_mmu_mode();

deservedly blows up.

Cc: Balbir Singh <balbirs@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/pgtable.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/include/linux/pgtable.h~include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines
+++ a/include/linux/pgtable.h
@@ -232,9 +232,9 @@ static inline int pmd_dirty(pmd_t pmd)
  * and the mode cannot be used in interrupt context.
  */
 #ifndef __HAVE_ARCH_ENTER_LAZY_MMU_MODE
-#define arch_enter_lazy_mmu_mode()	do {} while (0)
-#define arch_leave_lazy_mmu_mode()	do {} while (0)
-#define arch_flush_lazy_mmu_mode()	do {} while (0)
+static inline void arch_enter_lazy_mmu_mode(void) {}
+static inline void arch_leave_lazy_mmu_mode(void) {}
+static inline void arch_flush_lazy_mmu_mode(void) {}
 #endif
 
 #ifndef pte_batch_hint
_

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

kasan-fix-warnings-caused-by-use-of-arch_enter_lazy_mmu_mode-fix.patch
memfd-move-mfd_all_flags-definition-to-memfdh.patch
mm-constify-highmem-related-functions-for-improved-const-correctness-fix.patch
mm-filemap-align-last_index-to-folio-size-fix-fix.patch
mm-re-enable-kswapd-when-memory-pressure-subsides-or-demotion-is-toggled-fix.patch
include-linux-pgtableh-convert-arch_enter_lazy_mmu_mode-and-friends-to-static-inlines.patch
panic-remove-redundant-panic-cpu-backtrace-fix.patch
crash-add-kunit-tests-for-crash_exclude_mem_range-fix.patch