zs_obj_read_sg_begin() always returns 0, convert it to void (per Yosry).

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
 include/linux/zsmalloc.h | 4 ++--
 mm/zsmalloc.c            | 6 ++----
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
index 11e614663dd3..478410c880b1 100644
--- a/include/linux/zsmalloc.h
+++ b/include/linux/zsmalloc.h
@@ -44,8 +44,8 @@ void *zs_obj_read_begin(struct zs_pool *pool, unsigned long handle,
 			size_t mem_len, void *local_copy);
 void zs_obj_read_end(struct zs_pool *pool, unsigned long handle,
 		     size_t mem_len, void *handle_mem);
-int zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
-		   struct scatterlist *sg, size_t mem_len);
+void zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
+			  struct scatterlist *sg, size_t mem_len);
 void zs_obj_read_sg_end(struct zs_pool *pool, unsigned long handle);
 void zs_obj_write(struct zs_pool *pool, unsigned long handle,
 		  void *handle_mem, size_t mem_len);
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 5abb8bc0956a..5a68349403d5 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1147,8 +1147,8 @@ void zs_obj_read_end(struct zs_pool *pool, unsigned long handle,
 }
 EXPORT_SYMBOL_GPL(zs_obj_read_end);
 
-int zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
-			 struct scatterlist *sg, size_t mem_len)
+void zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
+			  struct scatterlist *sg, size_t mem_len)
 {
 	struct zspage *zspage;
 	struct zpdesc *zpdesc;
@@ -1191,8 +1191,6 @@ int zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
 
 		sg_set_page(sg, zpdesc_page(zpdesc), sizes[1], 0);
 	}
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(zs_obj_read_sg_begin);
 
-- 
2.52.0.457.g6b5491de43-goog