diff options
| author | David S. Miller <davem@davemloft.net> | 2012-12-18 16:06:16 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-18 16:06:16 -0800 |
| commit | 4a9d1946b0135b15d901d7e7c9796d36f352aaea (patch) | |
| tree | 2c5edf477500773fd406ae5622bce07350385aae /arch/sparc | |
| parent | 6cb9c3697585c47977c42c5cc1b9fc49247ac530 (diff) | |
sparc64: Define pte_accessible()
We can elide flush_tlb_*() calls when _PAGE_VALID is clear
as that is the test used to determine whether or not to
queue up a TLB flush in set_pte_at().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/include/asm/pgtable_64.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 95515f1e7cef..7870be0f5adc 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -617,6 +617,12 @@ static inline unsigned long pte_present(pte_t pte) return val; } +#define pte_accessible pte_accessible +static inline unsigned long pte_accessible(pte_t a) +{ + return pte_val(a) & _PAGE_VALID; +} + static inline unsigned long pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; @@ -802,7 +808,7 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, * SUN4V NOTE: _PAGE_VALID is the same value in both the SUN4U * and SUN4V pte layout, so this inline test is fine. */ - if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) + if (likely(mm != &init_mm) && pte_accessible(orig)) tlb_batch_add(mm, addr, ptep, orig, fullmm); } |