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x86: revert "x86: fix pmd_bad and pud_bad to support huge pages"

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revert commit cded932b75,
"x86: fix pmd_bad and pud_bad to support huge pages", it causes
a bootup hang, as reported and bisected by Arjan van de Ven.

Bisected-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-03-03 13:53:58 +01:00
parent 9b5cf48b06
commit 902955fc13
2 changed files with 3 additions and 7 deletions
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4
include/asm-x86/pgtable_32.h
View File

@ -91,9 +91,7 @@ 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_present(x) (pmd_val(x) & _PAGE_PRESENT)
#define pmd_bad(x) ((pmd_val(x) \
& ~(PAGE_MASK | _PAGE_USER | _PAGE_PSE | _PAGE_NX)) \
!= _KERNPG_TABLE)
#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))

6
include/asm-x86/pgtable_64.h
View File

@ -153,14 +153,12 @@ static inline unsigned long pgd_bad(pgd_t pgd)
static inline unsigned long pud_bad(pud_t pud)
{
return pud_val(pud) &
~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER | _PAGE_PSE | _PAGE_NX);
return pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
}
static inline unsigned long pmd_bad(pmd_t pmd)
{
return pmd_val(pmd) &
~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER | _PAGE_PSE | _PAGE_NX);
return pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
}
#define pte_none(x) (!pte_val(x))