[PATCH 1/2] mm/mmap: remove unnecessary vp->vma check in vma_prepare

[Suren Baghdasaryan]

vp->vma in vma_prepare() is always non-NULL, therefore checking it is
not necessary. Remove the extra check.

Fixes: e8f071350ea5 ("mm/mmap: write-lock VMAs in vma_prepare before modifying them")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Link: https://lore.kernel.org/r/202302281802.J93Nma7q-lkp@xxxxxxxxx/
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
---
Fix cleanly apply over mm-unstable, SHA in "Fixes" is from that tree.

 mm/mmap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 0cd3714c2182..0759d53b470c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -505,8 +505,7 @@ static inline void init_vma_prep(struct vma_prepare *vp,
  */
 static inline void vma_prepare(struct vma_prepare *vp)
 {
-	if (vp->vma)
-		vma_start_write(vp->vma);
+	vma_start_write(vp->vma);
 	if (vp->adj_next)
 		vma_start_write(vp->adj_next);
 	/* vp->insert is always a newly created VMA, no need for locking */
-- 
2.39.2.722.g9855ee24e9-goog