diff options
Diffstat (limited to 'arch/mips/mm')
| -rw-r--r-- | arch/mips/mm/fault.c | 12 | ||||
| -rw-r--r-- | arch/mips/mm/tlb-r4k.c | 12 | ||||
| -rw-r--r-- | arch/mips/mm/tlbex.c | 24 |
3 files changed, 16 insertions, 32 deletions
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index a27045f5a556..d7878208bd3f 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -99,21 +99,13 @@ static void __do_page_fault(struct pt_regs *regs, unsigned long write, perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); retry: - mmap_read_lock(mm); - vma = find_vma(mm, address); + vma = lock_mm_and_find_vma(mm, address, regs); if (!vma) - goto bad_area; - if (vma->vm_start <= address) - goto good_area; - if (!(vma->vm_flags & VM_GROWSDOWN)) - goto bad_area; - if (expand_stack(vma, address)) - goto bad_area; + goto bad_area_nosemaphore; /* * Ok, we have a good vm_area for this memory access, so * we can handle it.. */ -good_area: si_code = SEGV_ACCERR; if (write) { diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c index 1b939abbe4ca..93c2d695588a 100644 --- a/arch/mips/mm/tlb-r4k.c +++ b/arch/mips/mm/tlb-r4k.c @@ -297,7 +297,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) p4d_t *p4dp; pud_t *pudp; pmd_t *pmdp; - pte_t *ptep; + pte_t *ptep, *ptemap = NULL; int idx, pid; /* @@ -344,7 +344,12 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) } else #endif { - ptep = pte_offset_map(pmdp, address); + ptemap = ptep = pte_offset_map(pmdp, address); + /* + * update_mmu_cache() is called between pte_offset_map_lock() + * and pte_unmap_unlock(), so we can assume that ptep is not + * NULL here: and what should be done below if it were NULL? + */ #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) #ifdef CONFIG_XPA @@ -373,6 +378,9 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte) tlbw_use_hazard(); htw_start(); flush_micro_tlb_vm(vma); + + if (ptemap) + pte_unmap(ptemap); local_irq_restore(flags); } diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index 80e05ee98d62..8d514a9082c6 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -2123,16 +2123,8 @@ static void build_r4000_tlb_load_handler(void) uasm_i_tlbr(&p); - switch (current_cpu_type()) { - case CPU_CAVIUM_OCTEON: - case CPU_CAVIUM_OCTEON_PLUS: - case CPU_CAVIUM_OCTEON2: - break; - default: - if (cpu_has_mips_r2_exec_hazard) - uasm_i_ehb(&p); - break; - } + if (cpu_has_mips_r2_exec_hazard) + uasm_i_ehb(&p); /* Examine entrylo 0 or 1 based on ptr. */ if (use_bbit_insns()) { @@ -2197,16 +2189,8 @@ static void build_r4000_tlb_load_handler(void) uasm_i_tlbr(&p); - switch (current_cpu_type()) { - case CPU_CAVIUM_OCTEON: - case CPU_CAVIUM_OCTEON_PLUS: - case CPU_CAVIUM_OCTEON2: - break; - default: - if (cpu_has_mips_r2_exec_hazard) - uasm_i_ehb(&p); - break; - } + if (cpu_has_mips_r2_exec_hazard) + uasm_i_ehb(&p); /* Examine entrylo 0 or 1 based on ptr. */ if (use_bbit_insns()) { |