From 1026b9fa1074e480fb80c16a16b71bd2536e1cf0 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Tue, 4 May 2021 15:59:27 -0700
Subject: [PATCH] fix rsyncable mode

---
 lib/compress/zstdmt_compress.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
index 5f822da44..cfd75cc49 100644
--- a/lib/compress/zstdmt_compress.c
+++ b/lib/compress/zstdmt_compress.c
@@ -1240,9 +1240,8 @@ size_t ZSTDMT_initCStream_internal(
 
     if (params.rsyncable) {
         /* Aim for the targetsectionSize as the average job size. */
-        U32 const jobSizeMB = (U32)(mtctx->targetSectionSize >> 20);
-        U32 const rsyncBits = ZSTD_highbit32(jobSizeMB) + 20;
-        assert(jobSizeMB >= 1);
+        U32 const jobSizeKB = (U32)(mtctx->targetSectionSize >> 10);
+        U32 const rsyncBits = (assert(jobSizeKB >= 1), ZSTD_highbit32(jobSizeKB) + 10);
         DEBUGLOG(4, "rsyncLog = %u", rsyncBits);
         mtctx->rsync.hash = 0;
         mtctx->rsync.hitMask = (1ULL << rsyncBits) - 1;
-- 
2.47.2