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>

diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c
index db589ad5dbc41e5bb1cb0bc52dfc4faefc9c1820..c700d625067a96cb725064e0c19ceadad078cd6a 100644 (file)
--- a/arch/metag/kernel/dma.c
+++ b/arch/metag/kernel/dma.c
@@ -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);