mm/memory.c:print_vma_addr(): call up_read(&mm->mmap_sem) directly

Call up_read(&mm->mmap_sem) directly since we have already got mm via
current->mm at the beginning of print_vma_addr().

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/memory.c b/mm/memory.c
index 59e5bebc2e35a84273354c99c69c35b867b4433e..ec72a616ccd4a4d5862f956a5af5802a6384f17e 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3941,7 +3941,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
                        free_page((unsigned long)buf);
                }
        }
-       up_read(&current->mm->mmap_sem);
+       up_read(&mm->mmap_sem);
 }
 
 #ifdef CONFIG_PROVE_LOCKING