x86: unify pmd_none
Impact: cleanup Unify and demacro pmd_none. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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3 changed files with 7 additions and 3 deletions
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@ -450,6 +450,13 @@ static inline int pmd_present(pmd_t pmd)
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return pmd_val(pmd) & _PAGE_PRESENT;
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}
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static inline int pmd_none(pmd_t pmd)
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{
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/* Only check low word on 32-bit platforms, since it might be
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out of sync with upper half. */
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return !(unsigned long)native_pmd_val(pmd);
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}
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#if PAGETABLE_LEVELS > 2
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static inline int pud_present(pud_t pud)
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{
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@ -85,8 +85,6 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
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/* The boot page tables (all created as a single array) */
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extern unsigned long pg0[];
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/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
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#define pmd_none(x) (!(unsigned long)pmd_val((x)))
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#define pmd_bad(x) ((pmd_val(x) & (PTE_FLAGS_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
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#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
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@ -207,7 +207,6 @@ static inline int pud_large(pud_t pte)
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#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
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#define pmd_offset(dir, address) ((pmd_t *)pud_page_vaddr(*(dir)) + \
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pmd_index(address))
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#define pmd_none(x) (!pmd_val((x)))
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#define pfn_pmd(nr, prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val((prot))))
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#define pmd_pfn(x) ((pmd_val((x)) & __PHYSICAL_MASK) >> PAGE_SHIFT)
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