diff options
| author | Anton Altaparmakov <aia21@cantab.net> | 2005-10-30 21:00:04 +0000 |
|---|---|---|
| committer | Anton Altaparmakov <aia21@cantab.net> | 2005-10-30 21:00:04 +0000 |
| commit | 07b188ab773e183871e57b33ae37bf635c9f12ba (patch) | |
| tree | 311df8a0dd12fb7bd3e9b5b1a5ca500f0428d679 /include/asm-i386/pgtable.h | |
| parent | 47c564e10f219f867bdb49225972749a43485a47 (diff) | |
| parent | 9f75e1eff3edb2bb07349b94c28f4f2a6c66ca43 (diff) | |
Merge branch 'master' of /usr/src/ntfs-2.6/
Diffstat (limited to 'include/asm-i386/pgtable.h')
| -rw-r--r-- | include/asm-i386/pgtable.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h index d101ac414f0..0e3ec809352 100644 --- a/include/asm-i386/pgtable.h +++ b/include/asm-i386/pgtable.h @@ -203,7 +203,8 @@ extern unsigned long pg0[]; #define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE)) #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) -#define pmd_none(x) (!pmd_val(x)) +/* To avoid harmful races, pmd_none(x) should check only the lower when PAE */ +#define pmd_none(x) (!(unsigned long)pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) |