[merged mm-stable] powerpc-mm-implement-arch_flush_lazy_mmu_mode.patch removed from -mm tree

[merged mm-stable] powerpc-mm-implement-arch_flush_lazy_mmu_mode.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: powerpc/mm: implement arch_flush_lazy_mmu_mode()
has been removed from the -mm tree.  Its filename was
     powerpc-mm-implement-arch_flush_lazy_mmu_mode.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: Kevin Brodsky <kevin.brodsky@arm.com>
Subject: powerpc/mm: implement arch_flush_lazy_mmu_mode()
Date: Mon, 15 Dec 2025 15:03:12 +0000

Upcoming changes to the lazy_mmu API will cause arch_flush_lazy_mmu_mode()
to be called when leaving a nested lazy_mmu section.

Move the relevant logic from arch_leave_lazy_mmu_mode() to
arch_flush_lazy_mmu_mode() and have the former call the latter.  The
radix_enabled() check is required in both as arch_flush_lazy_mmu_mode()
will be called directly from the generic layer in a subsequent patch.

Note: the additional this_cpu_ptr() and radix_enabled() calls on the
arch_leave_lazy_mmu_mode() path will be removed in a subsequent patch.

Link: https://lkml.kernel.org/r/20251215150323.2218608-4-kevin.brodsky@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: David Hildenbrand (Red Hat) <david@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Juegren Gross <jgross@suse.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/powerpc/include/asm/book3s/64/tlbflush-hash.h |   15 ++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h~powerpc-mm-implement-arch_flush_lazy_mmu_mode
+++ a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
@@ -41,7 +41,7 @@ static inline void arch_enter_lazy_mmu_m
 	batch->active = 1;
 }
 
-static inline void arch_leave_lazy_mmu_mode(void)
+static inline void arch_flush_lazy_mmu_mode(void)
 {
 	struct ppc64_tlb_batch *batch;
 
@@ -51,12 +51,21 @@ static inline void arch_leave_lazy_mmu_m
 
 	if (batch->index)
 		__flush_tlb_pending(batch);
+}
+
+static inline void arch_leave_lazy_mmu_mode(void)
+{
+	struct ppc64_tlb_batch *batch;
+
+	if (radix_enabled())
+		return;
+	batch = this_cpu_ptr(&ppc64_tlb_batch);
+
+	arch_flush_lazy_mmu_mode();
 	batch->active = 0;
 	preempt_enable();
 }
 
-#define arch_flush_lazy_mmu_mode()      do {} while (0)
-
 extern void hash__tlbiel_all(unsigned int action);
 
 extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
_

Patches currently in -mm which might be from kevin.brodsky@arm.com are

selftests-mm-default-kdir-to-build-directory.patch
selftests-mm-remove-flaky-header-check.patch
selftests-mm-pass-down-full-cc-and-cflags-to-check_configsh.patch
selftests-mm-fix-usage-of-force_read-in-cow-tests.patch
selftests-mm-introduce-helper-to-read-every-page-in-range.patch
selftests-mm-fix-faulting-in-code-in-pagemap_ioctl-test.patch
selftests-mm-fix-exit-code-in-pagemap_ioctl.patch
selftests-mm-report-skip-in-pfnmap-if-a-check-fails.patch