[PATCH v2 1/7] mm: remove arch_flush_lazy_mmu_mode()
From: Kevin Brodsky <hidden>
Date: 2025-09-08 07:40:39
Also in:
linux-arm-kernel, linux-mm, lkml, sparclinux, xen-devel
Subsystem:
arm64 port (aarch64 architecture), linux for powerpc (32-bit and 64-bit), memory management - core, sparc + ultrasparc (sparc/sparc64), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Catalin Marinas, Will Deacon, Madhavan Srinivasan, Michael Ellerman, Andrew Morton, David Hildenbrand, "David S. Miller", Andreas Larsson, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
This function has only ever been used in arch/x86, so there is no need for other architectures to implement it. Remove it from linux/pgtable.h and all architectures besides x86. The arm64 implementation is not empty but it is only called from arch_leave_lazy_mmu_mode(), so we can simply fold it there. Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Signed-off-by: Kevin Brodsky <redacted> --- arch/arm64/include/asm/pgtable.h | 9 +-------- arch/powerpc/include/asm/book3s/64/tlbflush-hash.h | 2 -- arch/sparc/include/asm/tlbflush_64.h | 1 - arch/x86/include/asm/pgtable.h | 3 ++- include/linux/pgtable.h | 1 - 5 files changed, 3 insertions(+), 13 deletions(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index abd2dee416b3..728d7b6ed20a 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h@@ -101,21 +101,14 @@ static inline void arch_enter_lazy_mmu_mode(void) set_thread_flag(TIF_LAZY_MMU); } -static inline void arch_flush_lazy_mmu_mode(void) +static inline void arch_leave_lazy_mmu_mode(void) { if (in_interrupt()) return; if (test_and_clear_thread_flag(TIF_LAZY_MMU_PENDING)) emit_pte_barriers(); -} - -static inline void arch_leave_lazy_mmu_mode(void) -{ - if (in_interrupt()) - return; - arch_flush_lazy_mmu_mode(); clear_thread_flag(TIF_LAZY_MMU); }
diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
index 146287d9580f..176d7fd79eeb 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h@@ -55,8 +55,6 @@ static inline void arch_leave_lazy_mmu_mode(void) 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,
diff --git a/arch/sparc/include/asm/tlbflush_64.h b/arch/sparc/include/asm/tlbflush_64.h
index 8b8cdaa69272..cd144eb31bdd 100644
--- a/arch/sparc/include/asm/tlbflush_64.h
+++ b/arch/sparc/include/asm/tlbflush_64.h@@ -44,7 +44,6 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end); void flush_tlb_pending(void); void arch_enter_lazy_mmu_mode(void); void arch_leave_lazy_mmu_mode(void); -#define arch_flush_lazy_mmu_mode() do {} while (0) /* Local cpu only. */ void __flush_tlb_all(void);
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index e33df3da6980..14fd672bc9b2 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h@@ -117,7 +117,8 @@ extern pmdval_t early_pmd_flags; #define pte_val(x) native_pte_val(x) #define __pte(x) native_make_pte(x) -#define arch_end_context_switch(prev) do {} while(0) +#define arch_end_context_switch(prev) do {} while (0) +#define arch_flush_lazy_mmu_mode() do {} while (0) #endif /* CONFIG_PARAVIRT_XXL */ static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set)
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 94249e671a7e..8d6007123cdf 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h@@ -234,7 +234,6 @@ static inline int pmd_dirty(pmd_t pmd) #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) #endif #ifndef pte_batch_hint
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2.47.0