From: Rolf Eike Beer <eb@emlix.com>
Date: Wed, 24 Aug 2022 11:00:11 +0000 (+0200)
Subject: mm: pagewalk: add back missing variable initializations
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=87ba1ba1d9a976094859915d429e8b73cda7b01e;p=users%2Fjedix%2Flinux-maple.git

mm: pagewalk: add back missing variable initializations

These initializations accidentially got lost during refactoring.

The first one can't actually be used without initialization, because
walk_p4d_range() is only called when one of the 4 callbacks is set, but relying
on this seems fragile.

Link: https://lkml.kernel.org/r/2123960.ggj6I0NvhH@mobilepool36.emlix.com
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index a892637361c9f..418717eec09e2 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -308,7 +308,7 @@ static int walk_hugetlb_range(unsigned long addr, unsigned long end,
 	const struct mm_walk_ops *ops = walk->ops;
 
 	for (; addr < end; addr = next) {
-		int err;
+		int err = 0;
 		pte_t *pte = huge_pte_offset(walk->mm, addr & hmask, sz);
 
 		next = hugetlb_entry_end(h, addr, end);