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s390/mm: add NUMA balancing primitives

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Define pte_protnone and pmd_protnone for NUMA memory migration.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2014-09-23 14:01:34 +02:00
parent 888d5e9804
commit b54565b868
1 changed files with 13 additions and 0 deletions
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13
arch/s390/include/asm/pgtable.h
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@ -576,6 +576,19 @@ static inline int pte_same(pte_t a, pte_t b)
return pte_val(a) == pte_val(b);
}
#ifdef CONFIG_NUMA_BALANCING
static inline int pte_protnone(pte_t pte)
{
return pte_present(pte) && !(pte_val(pte) & _PAGE_READ);
}
static inline int pmd_protnone(pmd_t pmd)
{
/* pmd_large(pmd) implies pmd_present(pmd) */
return pmd_large(pmd) && !(pmd_val(pmd) & _SEGMENT_ENTRY_READ);
}
#endif
static inline pgste_t pgste_get_lock(pte_t *ptep)
{
unsigned long new = 0;