svn commit: r272894 - head/sys/dev/mc146818
Stefan Farfeleder
stefanf at FreeBSD.org
Fri Oct 10 16:06:25 UTC 2014
On Fri, Oct 10, 2014 at 02:17:43PM +0000, Baptiste Daroussin wrote:
> Author: bapt
> Date: Fri Oct 10 14:17:42 2014
> New Revision: 272894
> URL: https://svnweb.freebsd.org/changeset/base/272894
>
> Log:
> Use FreeBSD-bit-checking-style
> This appease gcc 4.9 issuing warnings about parentheses
>
> Differential Revision: https://reviews.freebsd.org/D933
> Reviewed by: marius
>
> Modified:
> head/sys/dev/mc146818/mc146818.c
>
> Modified: head/sys/dev/mc146818/mc146818.c
> ==============================================================================
> --- head/sys/dev/mc146818/mc146818.c Fri Oct 10 12:38:53 2014 (r272893)
> +++ head/sys/dev/mc146818/mc146818.c Fri Oct 10 14:17:42 2014 (r272894)
> @@ -77,7 +77,7 @@ mc146818_attach(device_t dev)
> }
>
> mtx_lock_spin(&sc->sc_mtx);
> - if (!(*sc->sc_mcread)(dev, MC_REGD) & MC_REGD_VRT) {
> + if (((*sc->sc_mcread)(dev, MC_REGD) & MC_REGD_VRT) == 0) {
> mtx_unlock_spin(&sc->sc_mtx);
> device_printf(dev, "%s: battery low\n", __func__);
> return (ENXIO);
This changes the meaning. The old code was parsed as
'(!...) & MC_REGD_VRT' which evaluates to constant 0.
Probably this was wrong, but your comment doesn't seem to indicate that.
The other two changes are fine.
Stefan
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