ARC: mm: use SCRATCH_DATA0 register for caching pgdir in ARCv2 only

[linux-2.6-microblaze.git] / arch / arc / include / asm / pgtable.h

diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
index 0c3e220..80b57c1 100644 (file)
--- a/arch/arc/include/asm/pgtable.h
+++ b/arch/arc/include/asm/pgtable.h
@@ -284,29 +284,6 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
        set_pte(ptep, pteval);
 }
 
        set_pte(ptep, pteval);
 }
 

-/*
- * Macro to quickly access the PGD entry, utlising the fact that some
- * arch may cache the pointer to Page Directory of "current" task
- * in a MMU register
- *
- * Thus task->mm->pgd (3 pointer dereferences, cache misses etc simply
- * becomes read a register
- *
- * ********CAUTION*******:
- * Kernel code might be dealing with some mm_struct of NON "current"
- * Thus use this macro only when you are certain that "current" is current
- * e.g. when dealing with signal frame setup code etc
- */
-#ifdef ARC_USE_SCRATCH_REG
-#define pgd_offset_fast(mm, addr)      \
-({                                     \
-       pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0);  \
-       pgd_base + pgd_index(addr);     \
-})
-#else
-#define pgd_offset_fast(mm, addr)      pgd_offset(mm, addr)
-#endif
-

 extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
                      pte_t *ptep);
 extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
                      pte_t *ptep);