fs/proc/kcore.c: fix coccinelle reported ERROR instances

Coccinelle complains about the nested reuse of the pointer `iter' with
different pointer type:

./fs/proc/kcore.c:515:26-30: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:534:23-27: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:550:40-44: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:568:27-31: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:581:28-32: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:599:27-31: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:607:38-42: ERROR: invalid reference to the index variable of the iterator on line 499
./fs/proc/kcore.c:614:26-30: ERROR: invalid reference to the index variable of the iterator on line 499

Replacing `struct kcore_list *iter' with `struct kcore_list *tmp' doesn't change the
scope and the functionality is the same and coccinelle seems happy.

NOTE: There was an issue with using `struct kcore_list *pos' as the nested iterator.
      The build did not work!

[[email protected]: s/tmp/pos/]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 04d168c ("fs/proc/kcore.c: remove check of list iterator against head past the loop body")
Signed-off-by: Jakob Koschel <[email protected]>
Signed-off-by: Mirsad Todorovac <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: "Brian Johannesmeyer" <[email protected]>
Cc: Cristiano Giuffrida <[email protected]>
Cc: "Bos, H.J." <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Yang Li <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Hari Bathini <[email protected]>
Cc: Yan Zhen <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Mirsad Todorovac

fs/proc/kcore.c

@@ -493,13 +493,13 @@ static ssize_t read_kcore_iter(struct kiocb *iocb, struct iov_iter *iter)
 		 * the previous entry, search for a matching entry.
 		 */
 		if (!m || start < m->addr || start >= m->addr + m->size) {
-			struct kcore_list *iter;
+			struct kcore_list *pos;
 
 			m = NULL;
-			list_for_each_entry(iter, &kclist_head, list) {
-				if (start >= iter->addr &&
-				    start < iter->addr + iter->size) {
-					m = iter;
+			list_for_each_entry(pos, &kclist_head, list) {
+				if (start >= pos->addr &&
+				    start < pos->addr + pos->size) {
+					m = pos;
 					break;
 				}
 			}