[PATCH v6 11/14] powerpc/mm: replace batch->active with is_lazy_mmu_mode_active()
From: Kevin Brodsky <hidden>
Date: 2025-12-15 15:04:39
Also in:
linux-arm-kernel, linux-mm, lkml, sparclinux, xen-devel
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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. Acked-by: David Hildenbrand <redacted> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Tested-by: Venkat Rao Bagalkote <redacted> Signed-off-by: Kevin Brodsky <redacted> --- arch/powerpc/include/asm/book3s/64/tlbflush-hash.h | 9 --------- arch/powerpc/mm/book3s64/hash_tlb.c | 2 +- 2 files changed, 1 insertion(+), 10 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
index 565c1b7c3eae..6cc9abcd7b3d 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h@@ -12,7 +12,6 @@ #define PPC64_TLB_BATCH_NR 192 struct ppc64_tlb_batch { - int active; unsigned long index; struct mm_struct *mm; real_pte_t pte[PPC64_TLB_BATCH_NR];
@@ -26,8 +25,6 @@ extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch); static inline void arch_enter_lazy_mmu_mode(void) { - struct ppc64_tlb_batch *batch; - if (radix_enabled()) return; /*
@@ -35,8 +32,6 @@ static inline void arch_enter_lazy_mmu_mode(void) * operating on kernel page tables. */ preempt_disable(); - batch = this_cpu_ptr(&ppc64_tlb_batch); - batch->active = 1; } static inline void arch_flush_lazy_mmu_mode(void)
@@ -53,14 +48,10 @@ static inline void arch_flush_lazy_mmu_mode(void) 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(); }
diff --git a/arch/powerpc/mm/book3s64/hash_tlb.c b/arch/powerpc/mm/book3s64/hash_tlb.c
index 787f7a0e27f0..fbdeb8981ae7 100644
--- a/arch/powerpc/mm/book3s64/hash_tlb.c
+++ b/arch/powerpc/mm/book3s64/hash_tlb.c@@ -100,7 +100,7 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr, * Check if we have an active batch on this CPU. If not, just * flush now and return. */ - if (!batch->active) { + if (!is_lazy_mmu_mode_active()) { flush_hash_page(vpn, rpte, psize, ssize, mm_is_thread_local(mm)); put_cpu_var(ppc64_tlb_batch); return;
--
2.51.2