erofs: remove the occupied parameter from z_erofs_pagevec_enqueue()

No any behavior to variable occupied in z_erofs_attach_page() which
is only caller to z_erofs_pagevec_enqueue().

Link: https://lore.kernel.org/r/20210419102623.2015-1-zbestahu@gmail.com
Signed-off-by: Yue Hu <huyue2@yulong.com>
Reviewed-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Gao Xiang <xiang@kernel.org>

Author: Yue Hu

fs/erofs/zdata.c

@@ -380,16 +380,14 @@ static int z_erofs_attach_page(struct z_erofs_collector *clt,
 			       enum z_erofs_page_type type)
 {
 	int ret;
-	bool occupied;
 
 	/* give priority for inplaceio */
 	if (clt->mode >= COLLECT_PRIMARY &&
 	    type == Z_EROFS_PAGE_TYPE_EXCLUSIVE &&
 	    z_erofs_try_inplace_io(clt, page))
 		return 0;
 
-	ret = z_erofs_pagevec_enqueue(&clt->vector,
-				      page, type, &occupied);
+	ret = z_erofs_pagevec_enqueue(&clt->vector, page, type);
 	clt->cl->vcnt += (unsigned int)ret;
 
 	return ret ? 0 : -EAGAIN;

fs/erofs/zpvec.h

@@ -107,10 +107,8 @@ static inline void z_erofs_pagevec_ctor_init(struct z_erofs_pagevec_ctor *ctor,
 
 static inline bool z_erofs_pagevec_enqueue(struct z_erofs_pagevec_ctor *ctor,
 					   struct page *page,
-					   enum z_erofs_page_type type,
-					   bool *occupied)
+					   enum z_erofs_page_type type)
 {
-	*occupied = false;
 	if (!ctor->next && type)
 		if (ctor->index + 1 == ctor->nr)
 			return false;
@@ -125,7 +123,6 @@ static inline bool z_erofs_pagevec_enqueue(struct z_erofs_pagevec_ctor *ctor,
 	/* should remind that collector->next never equal to 1, 2 */
 	if (type == (uintptr_t)ctor->next) {
 		ctor->next = page;
-		*occupied = true;
 	}
 	ctor->pages[ctor->index++] = tagptr_fold(erofs_vtptr_t, page, type);
 	return true;