| 62,44 → 62,8 |
|---|
| return ((value >> rightshift) & mask) << leftshift; |
| } |
| |
| /* |
| * Bits _PAGE_BIT_PRESENT, _PAGE_BIT_FILE and _PAGE_BIT_PROTNONE are taken, |
| * split up the 29 bits of offset into this range. |
| */ |
| #define PTE_FILE_MAX_BITS 29 |
| #define PTE_FILE_SHIFT1 (_PAGE_BIT_PRESENT + 1) |
| #define PTE_FILE_SHIFT2 (_PAGE_BIT_FILE + 1) |
| #define PTE_FILE_SHIFT3 (_PAGE_BIT_PROTNONE + 1) |
| #define PTE_FILE_BITS1 (PTE_FILE_SHIFT2 - PTE_FILE_SHIFT1 - 1) |
| #define PTE_FILE_BITS2 (PTE_FILE_SHIFT3 - PTE_FILE_SHIFT2 - 1) |
| |
| #define PTE_FILE_MASK1 ((1U << PTE_FILE_BITS1) - 1) |
| #define PTE_FILE_MASK2 ((1U << PTE_FILE_BITS2) - 1) |
| |
| #define PTE_FILE_LSHIFT2 (PTE_FILE_BITS1) |
| #define PTE_FILE_LSHIFT3 (PTE_FILE_BITS1 + PTE_FILE_BITS2) |
| |
| static __always_inline pgoff_t pte_to_pgoff(pte_t pte) |
| { |
| return (pgoff_t) |
| (pte_bitop(pte.pte_low, PTE_FILE_SHIFT1, PTE_FILE_MASK1, 0) + |
| pte_bitop(pte.pte_low, PTE_FILE_SHIFT2, PTE_FILE_MASK2, PTE_FILE_LSHIFT2) + |
| pte_bitop(pte.pte_low, PTE_FILE_SHIFT3, -1UL, PTE_FILE_LSHIFT3)); |
| } |
| |
| static __always_inline pte_t pgoff_to_pte(pgoff_t off) |
| { |
| return (pte_t){ |
| .pte_low = |
| pte_bitop(off, 0, PTE_FILE_MASK1, PTE_FILE_SHIFT1) + |
| pte_bitop(off, PTE_FILE_LSHIFT2, PTE_FILE_MASK2, PTE_FILE_SHIFT2) + |
| pte_bitop(off, PTE_FILE_LSHIFT3, -1UL, PTE_FILE_SHIFT3) + |
| _PAGE_FILE, |
| }; |
| } |
| |
| /* Encode and de-code a swap entry */ |
| #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) |
| #define SWP_TYPE_BITS 5 |
| #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) |
| |
| #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) |