[merged mm-stable] sparc-mm-replace-batch-active-with-is_lazy_mmu_mode_active.patch removed from -mm tree

[merged mm-stable] sparc-mm-replace-batch-active-with-is_lazy_mmu_mode_active.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: sparc/mm: replace batch->active with is_lazy_mmu_mode_active()
has been removed from the -mm tree.  Its filename was
     sparc-mm-replace-batch-active-with-is_lazy_mmu_mode_active.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: sparc/mm: replace batch->active with is_lazy_mmu_mode_active()
Date: Mon, 15 Dec 2025 15:03:21 +0000

A per-CPU batch struct is activated when entering lazy MMU mode; its
lifetime is the same as the lazy MMU section (it is deactivated when
leaving the mode).  Preemption is disabled in that interval to ensure that
the per-CPU reference remains valid.

The generic lazy_mmu layer now tracks whether a task is in lazy MMU mode. 
We can therefore use the generic helper is_lazy_mmu_mode_active() to tell
whether a batch struct is active instead of tracking it explicitly.

Link: https://lkml.kernel.org/r/20251215150323.2218608-13-kevin.brodsky@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.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 <david@redhat.com>
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: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/sparc/include/asm/tlbflush_64.h |    1 -
 arch/sparc/mm/tlb.c                  |    9 +--------
 2 files changed, 1 insertion(+), 9 deletions(-)

--- a/arch/sparc/include/asm/tlbflush_64.h~sparc-mm-replace-batch-active-with-is_lazy_mmu_mode_active
+++ a/arch/sparc/include/asm/tlbflush_64.h
@@ -12,7 +12,6 @@ struct tlb_batch {
 	unsigned int hugepage_shift;
 	struct mm_struct *mm;
 	unsigned long tlb_nr;
-	unsigned long active;
 	unsigned long vaddrs[TLB_BATCH_NR];
 };
 
--- a/arch/sparc/mm/tlb.c~sparc-mm-replace-batch-active-with-is_lazy_mmu_mode_active
+++ a/arch/sparc/mm/tlb.c
@@ -52,11 +52,7 @@ out:
 
 void arch_enter_lazy_mmu_mode(void)
 {
-	struct tlb_batch *tb;
-
 	preempt_disable();
-	tb = this_cpu_ptr(&tlb_batch);
-	tb->active = 1;
 }
 
 void arch_flush_lazy_mmu_mode(void)
@@ -69,10 +65,7 @@ void arch_flush_lazy_mmu_mode(void)
 
 void arch_leave_lazy_mmu_mode(void)
 {
-	struct tlb_batch *tb = this_cpu_ptr(&tlb_batch);
-
 	arch_flush_lazy_mmu_mode();
-	tb->active = 0;
 	preempt_enable();
 }
 
@@ -93,7 +86,7 @@ static void tlb_batch_add_one(struct mm_
 		nr = 0;
 	}
 
-	if (!tb->active) {
+	if (!is_lazy_mmu_mode_active()) {
 		flush_tsb_user_page(mm, vaddr, hugepage_shift);
 		global_flush_tlb_page(mm, vaddr);
 		goto out;
_

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