Blackfin arch: Fixing Bug: balance calls to get_task_mm with corresponding mmput...

We must balance calls to get_task_mm with corresponding mmput calls, otherwise
refcounting is screwed up and mms don't get freed when their task exits.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index 8823e9a..afd044e 100644 (file)
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -118,12 +118,14 @@ static int printk_address(unsigned long address)
                                        offset = (address - vma->vm_start) + (vma->vm_pgoff << PAGE_SHIFT);
 
                                write_unlock_irq(&tasklist_lock);
+                               mmput(mm);
                                return printk("<0x%p> [ %s + 0x%lx ]",
                                              (void *)address, name, offset);
                        }
 
                        vml = vml->next;
                }
+               mmput(mm);
        }
        write_unlock_irq(&tasklist_lock);