evie/android_kernel_oneplus_msm8998
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[SPARC64]: Align address in huge_pte_alloc().

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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>
This commit is contained in:
David S. Miller 2006-03-31 00:36:25 -08:00 • committed by David S. Miller
parent 73c50a27a4
commit 9df1dab1df
1 changed files with 7 additions and 0 deletions
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7
arch/sparc64/mm/hugetlbpage.c
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@ -198,6 +198,13 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
pmd_t *pmd; pmd_t *pmd;
pte_t *pte = NULL; 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); pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr); pud = pud_alloc(mm, pgd, addr);
if (pud) { if (pud) {