Problem serial.c on module

Hi

Since /drivers/char/serial.c was updated to "5.05c","2001-07-08",
system clash when pcmcia modem cards ejects.

I examined this problem and had a question.
Dose it need following branch?
================L5375==
#ifdef CONFIG_ALL_PPC
        /* early PowerMacs would machine check */
        if (_machine == _MACH_Pmac) {
                printk(KERN_INFO "serial.c: nothing to do on PowerMacs.\n");
                return 0;
        }
#endif
=======================

Anyway, pcmcia modem card on my TiBook seems work fine with following patch.

Thanks.

Taizo