Clang warns:
mm/pagewalk.c:318:12: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
else if (ops->pte_hole)
^~~~~~~~~~~~~
mm/pagewalk.c:321:7: note: uninitialized use occurs here
if (err)
^~~
mm/pagewalk.c:318:8: note: remove the 'if' if its condition is always true
else if (ops->pte_hole)
^~~~~~~~~~~~~~~~~~
mm/pagewalk.c:311:10: note: initialize the variable 'err' to silence this warning
int err;
^
= 0
1 error generated.
Restore the initialization of err to zero so that it cannot be used
uninitialized.
Fixes: 9ce1db56225a ("mm: pagewalk: make error checks more obvious")
Link: https://github.com/ClangBuiltLinux/linux/issues/1694
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
---
I am sure that SHA is not stable and I expect this to be squashed into
the original change.
mm/pagewalk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index 54b2a1beeeb3..76e5ccda8c88 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);
base-commit: d711de4adbec4cb0b8769bcae971b13293e6d311
--
2.37.2
