add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/tty/pty.c
..
..
@@ -29,6 +29,7 @@
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 #include <linux/file.h>
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 #include <linux/ioctl.h>
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 #include <linux/compat.h>
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+#include "tty.h"
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 #undef TTY_DEBUG_HANGUP
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 #ifdef TTY_DEBUG_HANGUP