[WIP] [PATCH 08/12] erofs-utils: fuse: drop z_erofs_shifted_transform()

[Gao Xiang via Linux-erofs <linux-erofs@lists.ozlabs.org>]

clean up as well.

[ let's fold in to the original patch. ]
Cc: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Gao Xiang <hsiangkao@aol.com>
---
 fuse/decompress.c | 26 +++++++++++---------------
 1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/fuse/decompress.c b/fuse/decompress.c
index 4a9f8e7995c1..d3ee3677e9a3 100644
--- a/fuse/decompress.c
+++ b/fuse/decompress.c
@@ -13,19 +13,6 @@
 #include "logging.h"
 #include "init.h"
 
-static int z_erofs_shifted_transform(struct z_erofs_decompress_req *rq)
-{
-	char *dest = rq->out;
-	char *src = rq->in + rq->ofs_head;
-
-	if (rq->inputsize != EROFS_BLKSIZ)
-		return -EFSCORRUPTED;
-
-	DBG_BUGON(rq->outputsize > EROFS_BLKSIZ);
-	memcpy(dest, src, rq->outputsize - rq->ofs_head);
-	return 0;
-}
-
 static int z_erofs_decompress_generic(struct z_erofs_decompress_req *rq)
 {
 	int ret = 0;
@@ -81,8 +68,17 @@ out:
 
 int z_erofs_decompress(struct z_erofs_decompress_req *rq)
 {
-	if (rq->alg == Z_EROFS_COMPRESSION_SHIFTED)
-		return z_erofs_shifted_transform(rq);
+	if (rq->alg == Z_EROFS_COMPRESSION_SHIFTED) {
+		if (rq->inputsize != EROFS_BLKSIZ)
+			return -EFSCORRUPTED;
+
+		DBG_BUGON(rq->outputsize > EROFS_BLKSIZ);
+		DBG_BUGON(rq->outputsize < rq->ofs_head);
+
+		memcpy(rq->out, rq->in + rq->ofs_head,
+		       rq->outputsize - rq->ofs_head);
+		return 0;
+	}
 
 	return z_erofs_decompress_generic(rq);
 }
-- 
2.24.0