add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/pnode.c
..
..
@@ -244,7 +244,7 @@
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 		}
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 		do {
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 			struct mount *parent = last_source->mnt_parent;
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-			if (last_source == first_source)
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+			if (peers(last_source, first_source))
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 				break;
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 			done = parent->mnt_master == p;
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 			if (done && peers(n, parent))