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Commit 4a9d1946 authored by David S. Miller's avatar David S. Miller
Browse files

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: default avatarDavid S. Miller <davem@davemloft.net>
parent 6cb9c369

arch/sparc/include/asm/pgtable_64.h

+7 −1
Original line number Diff line number Diff line
@@ -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);

}