erofs: fold in postsubmit_is_all_bypassed()

No need to introduce such separated helper since
cache strategy compile configs were changed into
runtime options instead in v5.4. No logic changes.

Link: https://lore.kernel.org/r/20200121064747.138987-1-gaoxiang25@huawei.comReviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>

fs/erofs/zdata.c

@@ -1148,20 +1148,6 @@ static void move_to_bypass_jobqueue(struct z_erofs_pcluster *pcl,
 	qtail[JQ_BYPASS] = &pcl->next;
 }
 
-static bool postsubmit_is_all_bypassed(struct z_erofs_decompressqueue *q[],
-				       unsigned int nr_bios, bool force_fg)
-{
-	/*
-	 * although background is preferred, no one is pending for submission.
-	 * don't issue workqueue for decompression but drop it directly instead.
-	 */
-	if (force_fg || nr_bios)
-		return false;
-
-	kvfree(q[JQ_SUBMIT]);
-	return true;
-}
-
 static bool z_erofs_submit_queue(struct super_block *sb,
 				 z_erofs_next_pcluster_t owned_head,
 				 struct list_head *pagepool,
@@ -1262,9 +1248,14 @@ static bool z_erofs_submit_queue(struct super_block *sb,
 	if (bio)
 		submit_bio(bio);
 
-	if (postsubmit_is_all_bypassed(q, nr_bios, *force_fg))
+	/*
+	 * although background is preferred, no one is pending for submission.
+	 * don't issue workqueue for decompression but drop it directly instead.
+	 */
+	if (!*force_fg && !nr_bios) {
+		kvfree(q[JQ_SUBMIT]);
 		return true;
-
+	}
 	z_erofs_decompress_kickoff(q[JQ_SUBMIT], *force_fg, nr_bios);
 	return true;
 }