From: Gao Xiang <hsiangkao@linux.alibaba.com>
Date: Tue, 10 Sep 2024 07:52:56 +0000 (+0800)
Subject: erofs-utils: lib: use another way to check power-of-2
X-Git-Tag: v1.8.2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=85ea711aafd3d1cab58ac757106536d742ec37f9;p=platform%2Fupstream%2Ferofs-utils.git

erofs-utils: lib: use another way to check power-of-2

Otherwise, Coverity will complain with "Operands don't affect result
(CONSTANT_EXPRESSION_RESULT)", which I don't think is an issue.

Coverity-id: 508261
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240910075256.3423180-1-hsiangkao@linux.alibaba.com
---

diff --git a/lib/kite_deflate.c b/lib/kite_deflate.c
index 4b1068b..592c4d1 100644
--- a/lib/kite_deflate.c
+++ b/lib/kite_deflate.c
@@ -834,7 +834,7 @@ static int kite_mf_init(struct kite_matchfinder *mf, unsigned int wsiz,
 		return -EINVAL;
 	cfg = &kite_mfcfg[level];
 
-	if (wsiz > kHistorySize32 || (1 << ilog2(wsiz)) != wsiz)
+	if (wsiz > kHistorySize32 || (wsiz & (wsiz - 1)))
 		return -EINVAL;
 
 	mf->hash = calloc(0x10000, sizeof(mf->hash[0]));