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x86: fix pte_modify() bug
fix sign extension bug in PTE_MASK / _PTE_CHG_MASK. this resolves the following bootup crash on PAE systems: [ 94.710726] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.717764] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.724772] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 [ 94.731777] init[1]: segfault at 00000004 ip 49471cbb sp bff0c6c0 error 4 Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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#ifdef __KERNEL__
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#define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK)
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#define PTE_MASK PHYSICAL_PAGE_MASK
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#define PTE_MASK (_AT(long, PHYSICAL_PAGE_MASK))
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#define LARGE_PAGE_SIZE (_AC(1,UL) << PMD_SHIFT)
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#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
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