From: Liu Song <liu.song11@xxxxxxxxxx>
After adjustment, the repeated assignment of "prev" is avoided,
and the readability of the code is improved.
Signed-off-by: Liu Song <liu.song11@xxxxxxxxxx>
---
mm/mprotect.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 883e2cc85cad..e552f5e0ccbd 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -563,7 +563,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
error = -ENOMEM;
if (!vma)
goto out;
- prev = vma->vm_prev;
+
if (unlikely(grows & PROT_GROWSDOWN)) {
if (vma->vm_start >= end)
goto out;
@@ -581,8 +581,11 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
goto out;
}
}
+
if (start > vma->vm_start)
prev = vma;
+ else
+ prev = vma->vm_prev;
for (nstart = start ; ; ) {
unsigned long mask_off_old_flags;
--
2.20.1
