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mm/page_isolation: fix clang deadcode warning 

When !CONFIG_VM_BUG_ON, there is warning of
clang-analyzer-deadcode.DeadStores:
Value stored to 'mt' during its initialization is never read.

Link: https://lkml.kernel.org/r/20221021101555.7992-2-quic_aiquny@quicinc.com
Signed-off-by: Maria Yu <quic_aiquny@quicinc.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Doug Berger <opendmb@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Maria Yu 2022-10-21 18:15:55 +08:00 committed by Andrew Morton
parent bb2282cf01
commit fba4eaf931
1 changed files with 1 additions and 1 deletions
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2
mm/page_isolation.c
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@ -330,7 +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));
int mt __maybe_unused = get_pageblock_migratetype(pfn_to_page(isolate_pageblock));
VM_BUG_ON(!is_migrate_isolate(mt));
} else {