I had a couple small style nits. On Tue, Oct 14, 2014 at 04:11:18AM -0700, Thomas Shao wrote: > diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c > index 3b9c9ef..1d8390c 100644 > --- a/drivers/hv/hv_util.c > +++ b/drivers/hv/hv_util.c > @@ -51,11 +51,30 @@ > #define HB_WS2008_MAJOR 1 > #define HB_WS2008_VERSION (HB_WS2008_MAJOR << 16 | HB_MINOR) > > +#define TIMESAMPLE_INTERVAL 5000000000L /* 5s in nanosecond */ If you wanted you could say: #define TIMESAMPLE_INTERVAL (5 * NSEC_PER_SEC) > + > +/*host sends time sample for every 5s.So the max polling interval > + *is 128*5 = 640s. > +*/ The comment still has problems throughout. Read Documentation/CodingStyle. > +#define TIME_ADJ_MAX_INTERVAL 128 /*Max polling interval */ > + > static int sd_srv_version; > static int ts_srv_version; > static int hb_srv_version; > static int util_fw_version; > > +/*host sends time sample for every 5s.So the initial polling interval > + *is 5s. > +*/ > +static s32 adj_interval = 1; Prefer mundane types instead there is a reason. This should be int because it's not specified in a hardware spec. I know you are being consistent with the surrounding code, but the surrounding code is bad so don't emulate it. > + > +/*The host_time_sync module parameter is used to control the time > + sync between host and guest. > +*/ > +static bool host_time_sync; > +module_param(host_time_sync, bool, (S_IRUGO | S_IWUSR)); > +MODULE_PARM_DESC(host_time_sync, "If the guest sync time with host"); Maybe say: "Synchronize time with the host"? > + > static void shutdown_onchannelcallback(void *context); > static struct hv_util_service util_shutdown = { > .util_cb = shutdown_onchannelcallback, > @@ -163,15 +182,61 @@ static void shutdown_onchannelcallback(void *context) > /* > * Set guest time to host UTC time. > */ > -static inline void do_adj_guesttime(u64 hosttime) > +static inline void do_adj_guesttime(u64 hosttime, bool forceSync) I'm surprise checkpatch.pl does't complain about this CamelCase. regards, dan carpenter _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel