| From: Maria Yu <quic_aiquny@quicinc.com> |
| Subject: mm/page_isolation: fix clang deadcode warning |
| Date: Fri, 21 Oct 2022 18:15:55 +0800 |
| |
| 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> |
| --- |
| |
| |
| --- a/mm/page_isolation.c~mm-page_isolation-fix-clang-deadcode-warning |
| +++ a/mm/page_isolation.c |
| @@ -330,7 +330,7 @@ static int isolate_single_pageblock(unsi |
| 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 { |
| _ |
