vm: avoid using find_vma_prev() unnecessarily

[mirror_ubuntu-artful-kernel.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 5a688a2756bec54435adbd5f3c13a33fbdd2c11e..f437d054c3bf6884fd5ba6f18338fbf7272c43a4 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -262,10 +262,11 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
 
        down_write(&current->mm->mmap_sem);
 
-       vma = find_vma_prev(current->mm, start, &prev);
+       vma = find_vma(current->mm, start);
        error = -ENOMEM;
        if (!vma)
                goto out;
+       prev = vma->vm_prev;
        if (unlikely(grows & PROT_GROWSDOWN)) {
                if (vma->vm_start >= end)
                        goto out;