diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/pgtable.h | 47 | ||||
| -rw-r--r-- | arch/parisc/kernel/cache.c | 5 |
2 files changed, 26 insertions, 26 deletions
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 7df49fad29f..1e40d7f86be 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -16,6 +16,8 @@ #include <asm/processor.h> #include <asm/cache.h> +extern spinlock_t pa_dbit_lock; + /* * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel * memory. For the return value to be meaningful, ADDR must be >= @@ -44,8 +46,11 @@ extern void purge_tlb_entries(struct mm_struct *, unsigned long); #define set_pte_at(mm, addr, ptep, pteval) \ do { \ + unsigned long flags; \ + spin_lock_irqsave(&pa_dbit_lock, flags); \ set_pte(ptep, pteval); \ purge_tlb_entries(mm, addr); \ + spin_unlock_irqrestore(&pa_dbit_lock, flags); \ } while (0) #endif /* !__ASSEMBLY__ */ @@ -435,48 +440,46 @@ extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { -#ifdef CONFIG_SMP + pte_t pte; + unsigned long flags; + if (!pte_young(*ptep)) return 0; - return test_and_clear_bit(xlate_pabit(_PAGE_ACCESSED_BIT), &pte_val(*ptep)); -#else - pte_t pte = *ptep; - if (!pte_young(pte)) + + spin_lock_irqsave(&pa_dbit_lock, flags); + pte = *ptep; + if (!pte_young(pte)) { + spin_unlock_irqrestore(&pa_dbit_lock, flags); return 0; - set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte)); + } + set_pte(ptep, pte_mkold(pte)); + purge_tlb_entries(vma->vm_mm, addr); + spin_unlock_irqrestore(&pa_dbit_lock, flags); return 1; -#endif } -extern spinlock_t pa_dbit_lock; - struct mm_struct; static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t old_pte; + unsigned long flags; - spin_lock(&pa_dbit_lock); + spin_lock_irqsave(&pa_dbit_lock, flags); old_pte = *ptep; pte_clear(mm,addr,ptep); - spin_unlock(&pa_dbit_lock); + purge_tlb_entries(mm, addr); + spin_unlock_irqrestore(&pa_dbit_lock, flags); return old_pte; } static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { -#ifdef CONFIG_SMP - unsigned long new, old; - - do { - old = pte_val(*ptep); - new = pte_val(pte_wrprotect(__pte (old))); - } while (cmpxchg((unsigned long *) ptep, old, new) != old); + unsigned long flags; + spin_lock_irqsave(&pa_dbit_lock, flags); + set_pte(ptep, pte_wrprotect(*ptep)); purge_tlb_entries(mm, addr); -#else - pte_t old_pte = *ptep; - set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte)); -#endif + spin_unlock_irqrestore(&pa_dbit_lock, flags); } #define pte_same(A,B) (pte_val(A) == pte_val(B)) diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 4b12890642e..83ded26cad0 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -421,14 +421,11 @@ void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) /* Note: purge_tlb_entries can be called at startup with no context. */ - /* Disable preemption while we play with %sr1. */ - preempt_disable(); - mtsp(mm->context, 1); purge_tlb_start(flags); + mtsp(mm->context, 1); pdtlb(addr); pitlb(addr); purge_tlb_end(flags); - preempt_enable(); } EXPORT_SYMBOL(purge_tlb_entries); |