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=3f092c2bf6048c47efb1168a3d7c2914f9d98057;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 4d5ce5bce190..818e00384d39 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -225,7 +225,7 @@ static int walk_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end,
 
 	p4d = p4d_offset(pgd, addr);
 	do {
-		int err;
+		int err = 0;
 
 		next = p4d_addr_end(addr, end);
 		if (p4d_none_or_clear_bad(p4d)) {