add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nilfs2/page.c
..
..
@@ -369,7 +369,15 @@
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 			struct page *page = pvec.pages[i];
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 			lock_page(page);
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-			nilfs_clear_dirty_page(page, silent);
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+
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+			/*
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+			 * This page may have been removed from the address
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+			 * space by truncation or invalidation when the lock
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+			 * was acquired.  Skip processing in that case.
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+			 */
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+			if (likely(page->mapping == mapping))
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+				nilfs_clear_dirty_page(page, silent);
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+
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 			unlock_page(page);
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 		}
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 		pagevec_release(&pvec);