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metag: dma: remove dead code in dma_alloc_init() 

Meta has 2 levels of page table so the pmd folds into the pud which
folds into the pgd. Therefore the !pmd check in dma_alloc_init() is dead
code since it essentially checks whether:
  (init_mm->pgd + 0x770) == 0

Remove the check.

Reported-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
This commit is contained in:
James Hogan 2013-11-14 10:14:37 +00:00
parent 6ce4eac1f6
commit cdf8d75818
1 changed files with 0 additions and 5 deletions
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5
arch/metag/kernel/dma.c
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@ -399,11 +399,6 @@ static int __init dma_alloc_init(void)
pgd = pgd_offset(&init_mm, CONSISTENT_START); pgd = pgd_offset(&init_mm, CONSISTENT_START);
pud = pud_alloc(&init_mm, pgd, CONSISTENT_START); pud = pud_alloc(&init_mm, pgd, CONSISTENT_START);
pmd = pmd_alloc(&init_mm, pud, CONSISTENT_START); pmd = pmd_alloc(&init_mm, pud, CONSISTENT_START);
if (!pmd) {
pr_err("%s: no pmd tables\n", __func__);
ret = -ENOMEM;
break;
}
WARN_ON(!pmd_none(*pmd)); WARN_ON(!pmd_none(*pmd));
pte = pte_alloc_kernel(pmd, CONSISTENT_START); pte = pte_alloc_kernel(pmd, CONSISTENT_START);