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x86: unify pmd_none

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Impact: cleanup

Unify and demacro pmd_none.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge
2009-02-05 11:30:51 -08:00
parent 649e8ef60f
commit 4fea801ac9
3 changed files with 7 additions and 3 deletions
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2
arch/x86/include/asm/pgtable_32.h
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@@ -85,8 +85,6 @@ extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
/* The boot page tables (all created as a single array) */
extern unsigned long pg0[];
/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
#define pmd_none(x) (!(unsigned long)pmd_val((x)))
#define pmd_bad(x) ((pmd_val(x) & (PTE_FLAGS_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))