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| author | David S. Miller <davem@davemloft.net> | 2006-03-31 10:36:25 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-04-01 09:03:36 +0200 |
| commit | 9df1dab1df58ef20ef7df9b8f39d86cf5d2d1949 (patch) | |
| tree | 7f697e5cc595c906b4779f8301ef3eb58cfea728 /arch/sparc64 | |
| parent | [SPARC64]: Document the instruction checks we do in do_sparc64_fault(). (diff) | |
| download | linux-9df1dab1df58ef20ef7df9b8f39d86cf5d2d1949.tar.xz linux-9df1dab1df58ef20ef7df9b8f39d86cf5d2d1949.zip | |
[SPARC64]: Align address in huge_pte_alloc().
We are about to fill in all HPAGE_SIZE's worth
of PAGE_SIZE ptes, so we have to give the first
pte in that set else we scribble over random memory
when we fill in the ptes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
| -rw-r--r-- | arch/sparc64/mm/hugetlbpage.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/sparc64/mm/hugetlbpage.c b/arch/sparc64/mm/hugetlbpage.c index 074620d413d4..fbbbebbad8a4 100644 --- a/arch/sparc64/mm/hugetlbpage.c +++ b/arch/sparc64/mm/hugetlbpage.c @@ -198,6 +198,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr) pmd_t *pmd; pte_t *pte = NULL; + /* We must align the address, because our caller will run + * set_huge_pte_at() on whatever we return, which writes out + * all of the sub-ptes for the hugepage range. So we have + * to give it the first such sub-pte. + */ + addr &= HPAGE_MASK; + pgd = pgd_offset(mm, addr); pud = pud_alloc(mm, pgd, addr); if (pud) { |