diff options
author | Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> | 2005-09-03 18:54:57 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 03:05:45 -0400 |
commit | 9b4ee40ebbbaf3f8c775b023d89ceedda1167d79 (patch) | |
tree | e227c96cf51beaa942fefa64277618e5cfc71217 /include/asm-i386 | |
parent | 4944e76d81801b8e60ed3e7789443f210c16ed65 (diff) |
[PATCH] mm: correct _PAGE_FILE comment
_PAGE_FILE does not indicate whether a file is in page / swap cache, it is
set just for non-linear PTE's. Correct the comment for i386, x86_64, UML.
Also clearify _PAGE_NONE.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386')
-rw-r--r-- | include/asm-i386/pgtable.h | 10 |
1 files changed, 5 insertions, 5 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); | |||
86 | #endif | 86 | #endif |
87 | 87 | ||
88 | /* | 88 | /* |
89 | * The 4MB page is guessing.. Detailed in the infamous "Chapter H" | 89 | * _PAGE_PSE set in the page directory entry just means that |
90 | * of the Pentium details, but assuming intel did the straightforward | ||
91 | * thing, this bit set in the page directory entry just means that | ||
92 | * the page directory entry points directly to a 4MB-aligned block of | 90 | * the page directory entry points directly to a 4MB-aligned block of |
93 | * memory. | 91 | * memory. |
94 | */ | 92 | */ |
@@ -119,8 +117,10 @@ void paging_init(void); | |||
119 | #define _PAGE_UNUSED2 0x400 | 117 | #define _PAGE_UNUSED2 0x400 |
120 | #define _PAGE_UNUSED3 0x800 | 118 | #define _PAGE_UNUSED3 0x800 |
121 | 119 | ||
122 | #define _PAGE_FILE 0x040 /* set:pagecache unset:swap */ | 120 | /* If _PAGE_PRESENT is clear, we use these: */ |
123 | #define _PAGE_PROTNONE 0x080 /* If not present */ | 121 | #define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ |
122 | #define _PAGE_PROTNONE 0x080 /* if the user mapped it with PROT_NONE; | ||
123 | pte_present gives true */ | ||
124 | #ifdef CONFIG_X86_PAE | 124 | #ifdef CONFIG_X86_PAE |
125 | #define _PAGE_NX (1ULL<<_PAGE_BIT_NX) | 125 | #define _PAGE_NX (1ULL<<_PAGE_BIT_NX) |
126 | #else | 126 | #else |