diff options
| -rw-r--r-- | include/asm-i386/pgtable.h | 10 | ||||
| -rw-r--r-- | include/asm-um/pgtable.h | 8 | ||||
| -rw-r--r-- | include/asm-x86_64/pgtable.h | 2 |
3 files changed, 11 insertions, 9 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index 77c6497f416e..c797286b512f 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -86,9 +86,7 @@ void paging_init(void); #endif /* - * The 4MB page is guessing.. Detailed in the infamous "Chapter H" - * of the Pentium details, but assuming intel did the straightforward - * thing, this bit set in the page directory entry just means that + * _PAGE_PSE set in the page directory entry just means that * the page directory entry points directly to a 4MB-aligned block of * memory. */ @@ -119,8 +117,10 @@ void paging_init(void); #define _PAGE_UNUSED2 0x400 #define _PAGE_UNUSED3 0x800 -#define _PAGE_FILE 0x040 /* set:pagecache unset:swap */ -#define _PAGE_PROTNONE 0x080 /* If not present */ +/* If _PAGE_PRESENT is clear, we use these: */ +#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ +#define _PAGE_PROTNONE 0x080 /* if the user mapped it with PROT_NONE; + pte_present gives true */ #ifdef CONFIG_X86_PAE #define _PAGE_NX (1ULL<<_PAGE_BIT_NX) #else diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h index a88040920311..e9336f616f9c 100644 --- a/include/asm-um/pgtable.h +++ b/include/asm-um/pgtable.h @@ -16,13 +16,15 @@ #define _PAGE_PRESENT 0x001 #define _PAGE_NEWPAGE 0x002 -#define _PAGE_NEWPROT 0x004 -#define _PAGE_FILE 0x008 /* set:pagecache unset:swap */ -#define _PAGE_PROTNONE 0x010 /* If not present */ +#define _PAGE_NEWPROT 0x004 #define _PAGE_RW 0x020 #define _PAGE_USER 0x040 #define _PAGE_ACCESSED 0x080 #define _PAGE_DIRTY 0x100 +/* If _PAGE_PRESENT is clear, we use these: */ +#define _PAGE_FILE 0x008 /* nonlinear file mapping, saved PTE; unset:swap */ +#define _PAGE_PROTNONE 0x010 /* if the user mapped it with PROT_NONE; + pte_present gives true */ #ifdef CONFIG_3_LEVEL_PGTABLES #include "asm/pgtable-3level.h" diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h index 4e167b5ea8f3..20476d129893 100644 --- a/include/asm-x86_64/pgtable.h +++ b/include/asm-x86_64/pgtable.h @@ -143,7 +143,7 @@ extern inline void pgd_clear (pgd_t * pgd) #define _PAGE_ACCESSED 0x020 #define _PAGE_DIRTY 0x040 #define _PAGE_PSE 0x080 /* 2MB page */ -#define _PAGE_FILE 0x040 /* set:pagecache, unset:swap */ +#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ #define _PAGE_GLOBAL 0x100 /* Global TLB entry */ #define _PAGE_PROTNONE 0x080 /* If not present */ |