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Thu, 20 Oct 2022 20:10:11 -0700 From: Maria Yu To: , , , , CC: Maria Yu , , , Subject: [PATCH] mm/page_isolation: fix clang deadcode warning Date: Fri, 21 Oct 2022 11:09:53 +0800 Message-ID: <20221021030953.34925-1-quic_aiquny@quicinc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: HqqFb_mtPIrkgfSpJYEGURS8f9LH0LXi X-Proofpoint-ORIG-GUID: HqqFb_mtPIrkgfSpJYEGURS8f9LH0LXi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-20_13,2022-10-20_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=660 malwarescore=0 clxscore=1011 phishscore=0 mlxscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210210017 ARC-Seal: i=1; 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dkim=pass header.d=quicinc.com header.s=qcppdkim1 header.b="WL8/QEuS"; spf=pass (imf14.hostedemail.com: domain of quic_aiquny@quicinc.com designates 205.220.168.131 as permitted sender) smtp.mailfrom=quic_aiquny@quicinc.com; dmarc=pass (policy=none) header.from=quicinc.com X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1666321817-197245 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When !CONFIG_VM_BUG_ON, there is warning of clang-analyzer-deadcode.DeadStores: Value stored to 'mt' during its initialization is never read. Signed-off-by: Maria Yu --- mm/page_isolation.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 04141a9bea70..51d5c8025f77 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -330,9 +330,7 @@ static int isolate_single_pageblock(unsigned long boundary_pfn, int flags, zone->zone_start_pfn); if (skip_isolation) { - int mt = get_pageblock_migratetype(pfn_to_page(isolate_pageblock)); - - VM_BUG_ON(!is_migrate_isolate(mt)); + VM_BUG_ON(!is_migrate_isolate(get_pageblock_migratetype(pfn_to_page(isolate_pageblock)))); } else { ret = set_migratetype_isolate(pfn_to_page(isolate_pageblock), migratetype, flags, isolate_pageblock, isolate_pageblock + pageblock_nr_pages); -- 2.17.1