libceph: drop return value from page vector copy routines

The return values provided for ceph_copy_to_page_vector() and
ceph_copy_from_page_vector() serve no purpose, so get rid of them.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

drivers/block/rbd.c

@@ -1890,8 +1890,7 @@ static int rbd_obj_method_sync(struct rbd_device *rbd_dev,
 	if (ret < 0)
 		goto out;
 	ret = 0;
-	(void) ceph_copy_from_page_vector(pages, inbound, 0,
-					obj_request->xferred);
+	ceph_copy_from_page_vector(pages, inbound, 0, obj_request->xferred);
 	if (version)
 		*version = obj_request->version;
 out:
@@ -2089,7 +2088,7 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev,
 
 	rbd_assert(obj_request->xferred <= (u64) SIZE_MAX);
 	size = (size_t) obj_request->xferred;
-	(void) ceph_copy_from_page_vector(pages, buf, 0, size);
+	ceph_copy_from_page_vector(pages, buf, 0, size);
 	rbd_assert(size <= (size_t) INT_MAX);
 	ret = (int) size;
 	if (version)

include/linux/ceph/libceph.h

@@ -232,10 +232,10 @@ extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags);
 extern int ceph_copy_user_to_page_vector(struct page **pages,
 					 const void __user *data,
 					 loff_t off, size_t len);
-extern int ceph_copy_to_page_vector(struct page **pages,
+extern void ceph_copy_to_page_vector(struct page **pages,
 				    const void *data,
 				    loff_t off, size_t len);
-extern int ceph_copy_from_page_vector(struct page **pages,
+extern void ceph_copy_from_page_vector(struct page **pages,
 				    void *data,
 				    loff_t off, size_t len);
 extern int ceph_copy_page_vector_to_user(struct page **pages, void __user *data,

net/ceph/pagevec.c

@@ -118,17 +118,17 @@ int ceph_copy_user_to_page_vector(struct page **pages,
 }
 EXPORT_SYMBOL(ceph_copy_user_to_page_vector);
 
-int ceph_copy_to_page_vector(struct page **pages,
+void ceph_copy_to_page_vector(struct page **pages,
 				    const void *data,
 				    loff_t off, size_t len)
 {
 	int i = 0;
 	size_t po = off & ~PAGE_CACHE_MASK;
 	size_t left = len;
-	size_t l;
 
 	while (left > 0) {
-		l = min_t(size_t, PAGE_CACHE_SIZE-po, left);
+		size_t l = min_t(size_t, PAGE_CACHE_SIZE-po, left);
+
 		memcpy(page_address(pages[i]) + po, data, l);
 		data += l;
 		left -= l;
@@ -138,21 +138,20 @@ int ceph_copy_to_page_vector(struct page **pages,
 			i++;
 		}
 	}
-	return len;
 }
 EXPORT_SYMBOL(ceph_copy_to_page_vector);
 
-int ceph_copy_from_page_vector(struct page **pages,
+void ceph_copy_from_page_vector(struct page **pages,
 				    void *data,
 				    loff_t off, size_t len)
 {
 	int i = 0;
 	size_t po = off & ~PAGE_CACHE_MASK;
 	size_t left = len;
-	size_t l;
 
 	while (left > 0) {
-		l = min_t(size_t, PAGE_CACHE_SIZE-po, left);
+		size_t l = min_t(size_t, PAGE_CACHE_SIZE-po, left);
+
 		memcpy(data, page_address(pages[i]) + po, l);
 		data += l;
 		left -= l;
@@ -162,7 +161,6 @@ int ceph_copy_from_page_vector(struct page **pages,
 			i++;
 		}
 	}
-	return len;
 }
 EXPORT_SYMBOL(ceph_copy_from_page_vector);