From: Hirokazu Takata Date: Fri, 11 May 2007 05:22:28 +0000 (-0700) Subject: m32r: fix pte_to_pgoff(), pgoff_to_pte() and __swp_type() macros X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=23c9bbbac57ae50dceadfda37b49785ec04dd42f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git m32r: fix pte_to_pgoff(), pgoff_to_pte() and __swp_type() macros This patch is required to handle file-mapped or swapped-out pages correctly. - Fix pte_to_pgoff() and pgoff_to_pte() macros not to include _PAGE_PROTNONE bit of PTE. Mask value for { ACCESSED, N, (R, W, X), L, G } is not 0xef but 0x7f. - Fix __swp_type() macro for MAX_SWAPFILES_SHIFT(=5), which is defined in include/linux/swap.h. * M32R TLB format [0] [1:19] [20:23] [24:31] +-----------------------+----+-------------+ | VPN |0000| ASID | +-----------------------+----+-------------+ +-+---------------------+----+-+---+-+-+-+-+ |0 PPN |0000|N|AC |L|G|V| | +-+---------------------+----+-+---+-+-+-+-+ || RWX | | * software bits in PTE || | +-- _PAGE_FILE | _PAGE_DIRTY || +---- _PAGE_PRESENT |+---------------- _PAGE_ACCESSED +----------------- _PAGE_PROTNONE Signed-off-by: Hitoshi Yamamoto Signed-off-by: Hirokazu Takata Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/asm-m32r/pgtable-2level.h b/include/asm-m32r/pgtable-2level.h index 750925726a10..bca3475f9595 100644 --- a/include/asm-m32r/pgtable-2level.h +++ b/include/asm-m32r/pgtable-2level.h @@ -71,8 +71,8 @@ static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address) #define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) #define PTE_FILE_MAX_BITS 29 -#define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0xef) | (((pte_val(pte) >> 10)) << 7)) -#define pgoff_to_pte(off) ((pte_t) { (((off) & 0xef) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) +#define pte_to_pgoff(pte) (((pte_val(pte) >> 2) & 0x7f) | (((pte_val(pte) >> 10)) << 7)) +#define pgoff_to_pte(off) ((pte_t) { (((off) & 0x7f) << 2) | (((off) >> 7) << 10) | _PAGE_FILE }) #endif /* __KERNEL__ */ #endif /* _ASM_M32R_PGTABLE_2LEVEL_H */ diff --git a/include/asm-m32r/pgtable.h b/include/asm-m32r/pgtable.h index 8b2a2f17e695..6604303fc47c 100644 --- a/include/asm-m32r/pgtable.h +++ b/include/asm-m32r/pgtable.h @@ -366,7 +366,7 @@ static inline void pmd_set(pmd_t * pmdp, pte_t * ptep) #define pte_unmap_nested(pte) do { } while (0) /* Encode and de-code a swap entry */ -#define __swp_type(x) (((x).val >> 2) & 0x3f) +#define __swp_type(x) (((x).val >> 2) & 0x1f) #define __swp_offset(x) ((x).val >> 10) #define __swp_entry(type, offset) \ ((swp_entry_t) { ((type) << 2) | ((offset) << 10) })