Re: if (a & X || b & ~Y) in dasd.c

[Jonathan Lundell]

At 3:57 PM -0500 11/8/01, Pete Zaitcev wrote:
>Carsten and others:
>
>this code in 2.2.14 looks suspicious to me:
>
>./drivers/s390/block/dasd.c:
>         /* first of all lets try to find out the appropriate era_action */
>         if (stat->flag & DEVSTAT_FLAG_SENSE_AVAIL ||
>             stat->dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) {
>                 /* anything abnormal ? */
>                 if (device->discipline->examine_error == NULL ||
>                     stat->flag & DEVSTAT_HALT_FUNCTION) {
>                         era = dasd_era_fatal;
>                 } else {
>                         era = device->discipline->examine_error (cqr, stat);
>                 }
>                 DASD_DRIVER_DEBUG_EVENT (1, dasd_int_handler," era_code %d",
>                                          era);
>         }
>
>Are you sure any parenthesises are not needed here?

It's OK. You're probably used to seeing (necessary) parens when || is 
replaced by == in this kind of expression.
-- 
/Jonathan Lundell.