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x86/mm: Remove flush_tlb() and flush_tlb_current_task()
I was trying to figure out what how flush_tlb_current_task() would possibly work correctly if current->mm != current->active_mm, but I realized I could spare myself the effort: it has no callers except the unused flush_tlb() macro. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Nadav Amit <namit@vmware.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/e52d64c11690f85e9f1d69d7b48cc2269cd2e94b.1492844372.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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2 changed files with 0 additions and 26 deletions
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@ -215,7 +215,6 @@ static inline void __flush_tlb_one(unsigned long addr)
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/*
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* TLB flushing:
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*
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* - flush_tlb() flushes the current mm struct TLBs
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* - flush_tlb_all() flushes all processes TLBs
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* - flush_tlb_mm(mm) flushes the specified mm context TLB's
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* - flush_tlb_page(vma, vmaddr) flushes one page
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@ -247,11 +246,6 @@ static inline void flush_tlb_all(void)
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__flush_tlb_all();
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}
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static inline void flush_tlb(void)
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{
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__flush_tlb_up();
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}
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static inline void local_flush_tlb(void)
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{
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__flush_tlb_up();
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@ -313,14 +307,11 @@ static inline void flush_tlb_kernel_range(unsigned long start,
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flush_tlb_mm_range(vma->vm_mm, start, end, vma->vm_flags)
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extern void flush_tlb_all(void);
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extern void flush_tlb_current_task(void);
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extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
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extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
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unsigned long end, unsigned long vmflag);
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extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
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#define flush_tlb() flush_tlb_current_task()
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void native_flush_tlb_others(const struct cpumask *cpumask,
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struct mm_struct *mm,
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unsigned long start, unsigned long end);
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@ -289,23 +289,6 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
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smp_call_function_many(cpumask, flush_tlb_func, &info, 1);
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}
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void flush_tlb_current_task(void)
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{
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struct mm_struct *mm = current->mm;
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preempt_disable();
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count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
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/* This is an implicit full barrier that synchronizes with switch_mm. */
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local_flush_tlb();
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trace_tlb_flush(TLB_LOCAL_SHOOTDOWN, TLB_FLUSH_ALL);
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if (cpumask_any_but(mm_cpumask(mm), smp_processor_id()) < nr_cpu_ids)
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flush_tlb_others(mm_cpumask(mm), mm, 0UL, TLB_FLUSH_ALL);
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preempt_enable();
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}
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/*
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* See Documentation/x86/tlb.txt for details. We choose 33
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* because it is large enough to cover the vast majority (at
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