s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table()

Let sparse not incorrectly complain about unbalanced locking.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 6d16132..1224db4 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -245,7 +245,9 @@
  * gmap_alloc_table is assumed to be called with mmap_sem held
  */
 static int gmap_alloc_table(struct gmap *gmap,
-			       unsigned long *table, unsigned long init)
+			    unsigned long *table, unsigned long init)
+	__releases(&gmap->mm->page_table_lock)
+	__acquires(&gmap->mm->page_table_lock)
 {
 	struct page *page;
 	unsigned long *new;