Commit cdf8d758 authored Nov 14, 2013 by James Hogan

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>

parent 6ce4eac1

arch/metag/kernel/dma.c

+0 −5

Original line number	Diff line number	Diff line
		@@ -399,11 +399,6 @@ static int __init dma_alloc_init(void)
		pgd = pgd_offset(&init_mm, CONSISTENT_START);
		pud = pud_alloc(&init_mm, pgd, 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));

		pte = pte_alloc_kernel(pmd, CONSISTENT_START);