MIPS: mm: Remove redundant drop_mmu_context() cpu argument

The drop_mmu_context() function accepts a cpu argument, but it implicitly expects that this is always equal to smp_processor_id() by allocating & configuring an ASID on the local CPU when the mm is active on the CPU indicated by the cpu argument. All callers do provide the value of smp_processor_id() to the cpu argument. Remove the redundant argument and have drop_mmu_context() call smp_processor_id() itself, making it clearer that the cpu variable always represents the local CPU. Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: linux-mips@vger.kernel.org
mariux64 · Feb 4, 2019 · 9a27324 · 9a27324
1 parent c653bd0
commit 9a27324
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Showing 5 changed files with 10 additions and 8 deletions.
diff --git a/arch/mips/include/asm/mmu_context.h b/arch/mips/include/asm/mmu_context.h
@@ -174,13 +174,15 @@ static inline void destroy_context(struct mm_struct *mm)
  * we will get a new one for it.
  */
 static inline void
-drop_mmu_context(struct mm_struct *mm, unsigned cpu)
+drop_mmu_context(struct mm_struct *mm)
 {
 	unsigned long flags;
+	unsigned int cpu;
 
 	local_irq_save(flags);
 	htw_stop();
 
+	cpu = smp_processor_id();
 	if (cpumask_test_cpu(cpu, mm_cpumask(mm)))  {
 		get_new_mmu_context(mm, cpu);
 		write_c0_entryhi(cpu_asid(cpu, mm));

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
@@ -700,7 +700,7 @@ static inline void local_r4k_flush_cache_page(void *args)
 			int cpu = smp_processor_id();
 
 			if (cpu_context(cpu, mm) != 0)
-				drop_mmu_context(mm, cpu);
+				drop_mmu_context(mm);
 		} else
 			vaddr ? r4k_blast_icache_page(addr) :
 				r4k_blast_icache_user_page(addr);

diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
@@ -75,7 +75,7 @@ void local_flush_tlb_mm(struct mm_struct *mm)
 #ifdef DEBUG_TLB
 		printk("[tlbmm<%lu>]", (unsigned long)cpu_context(cpu, mm));
 #endif
-		drop_mmu_context(mm, cpu);
+		drop_mmu_context(mm);
 	}
 }
 
@@ -117,7 +117,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 			}
 			write_c0_entryhi(oldpid);
 		} else {
-			drop_mmu_context(mm, cpu);
+			drop_mmu_context(mm);
 		}
 		local_irq_restore(flags);
 	}

diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
@@ -115,7 +115,7 @@ void local_flush_tlb_mm(struct mm_struct *mm)
 	cpu = smp_processor_id();
 
 	if (cpu_context(cpu, mm) != 0) {
-		drop_mmu_context(mm, cpu);
+		drop_mmu_context(mm);
 	}
 
 	preempt_enable();
@@ -163,7 +163,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 			write_c0_entryhi(oldpid);
 			htw_start();
 		} else {
-			drop_mmu_context(mm, cpu);
+			drop_mmu_context(mm);
 		}
 		flush_micro_tlb();
 		local_irq_restore(flags);

diff --git a/arch/mips/mm/tlb-r8k.c b/arch/mips/mm/tlb-r8k.c
@@ -55,7 +55,7 @@ void local_flush_tlb_mm(struct mm_struct *mm)
 	int cpu = smp_processor_id();
 
 	if (cpu_context(cpu, mm) != 0)
-		drop_mmu_context(mm, cpu);
+		drop_mmu_context(mm);
 }
 
 void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
@@ -75,7 +75,7 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
 	local_irq_save(flags);
 
 	if (size > TFP_TLB_SIZE / 2) {
-		drop_mmu_context(mm, cpu);
+		drop_mmu_context(mm);
 		goto out_restore;
 	}