[PATCH] fs/proc/task_mmu: fix uninitialized variable in pagemap_pmd_range()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

The "folio" pointer is tested for NULL, but it's either valid or
uninitialized.  Initialize it to NULL.

Fixes: 84f57f8b8914 ("fs/proc: move page_mapcount() to fs/proc/internal.h")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 fs/proc/task_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 631371cb80a0..6ed1f56b32b4 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1492,7 +1492,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
 		u64 flags = 0, frame = 0;
 		pmd_t pmd = *pmdp;
 		struct page *page = NULL;
-		struct folio *folio;
+		struct folio *folio = NULL;
 
 		if (vma->vm_flags & VM_SOFTDIRTY)
 			flags |= PM_SOFT_DIRTY;
-- 
2.43.0