[PATCH] mm: initialize return of vm_insert_pages

[trix]

From: Tom Rix <t...@redhat.com>

clang static analysis reports a garbage return

In file included from mm/memory.c:84:
mm/memory.c:1612:2: warning: Undefined or garbage value returned to caller 
[core.uninitialized.UndefReturn]
        return err;
        ^~~~~~~~~~

The setting of err depends on a loop executing.
So initialize err.

Signed-off-by: Tom Rix <t...@redhat.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index 17a3df0f3994..41513275823b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1601,7 +1601,7 @@ int vm_insert_pages(struct vm_area_struct *vma, unsigned 
long addr,
        return insert_pages(vma, addr, pages, num, vma->vm_page_prot);
 #else
        unsigned long idx = 0, pgcount = *num;
-       int err;
+       int err = 0;
 
        for (; idx < pgcount; ++idx) {
                err = vm_insert_page(vma, addr + (PAGE_SIZE * idx), pages[idx]);
-- 
2.18.1