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| author | Hugh Dickins <hugh@veritas.com> | 2008-05-20 14:59:47 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-20 17:14:45 +0200 |
| commit | a8375bd81cf99cb81be37127eaf08316ecb87619 (patch) | |
| tree | 8a657fe7e1a4afc762c0dafab10cfa89006dadc6 /fs/debugfs | |
| parent | xen: use PTE_MASK in pte_mfn() (diff) | |
| download | linux-a8375bd81cf99cb81be37127eaf08316ecb87619.tar.xz linux-a8375bd81cf99cb81be37127eaf08316ecb87619.zip | |
x86: strengthen 64-bit p?d_bad()
The x86_64 pgd_bad(), pud_bad(), pmd_bad() inlines have differed from
their x86_32 counterparts in a couple of ways: they've been unnecessarily
weak (e.g. letting 0 or 1 count as good), and were typed as unsigned long.
Strengthen them and return int.
The PAE pmd_bad was too weak before, allowing any junk in the upper half;
but got strengthened by the patch correcting its ~PAGE_MASK to ~PTE_MASK.
The PAE pud_bad already said ~PTE_MASK; and since it folds into pgd_bad,
and we don't set the protection bits at that level, it'll do as is.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/debugfs')
0 files changed, 0 insertions, 0 deletions