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-rw-r--r--include/linux/highmem.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 68c841afc622..b389a75be5d7 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -22,7 +22,7 @@ static inline unsigned int nr_free_highpages(void) { return 0; }
static inline void *kmap(struct page *page) { return page_address(page); }
-#define kunmap(page) do { } while (0)
+#define kunmap(page) do { (void) (page); } while (0)
#define kmap_atomic(page,idx) kmap(page)
#define kunmap_atomic(page,idx) kunmap(page)