Messages in this thread Patch in this message | | | From | Chunyan Zhang <> | Subject | [PATCH 4/6] driver/net/irda: Replace timeval with ktime_t in nsc-ircc | Date | Wed, 7 Jan 2015 11:39:36 +0800 |
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This patch changes the 32-bit time type (timeval) to the 64-bit one (ktime_t), since 32-bit time types will break in the year 2038. So, I use ktime_t instead of all uses of timeval.
This patch also changes do_gettimeofday() to ktime_get() accordingly, since ktime_get returns a ktime_t, but do_gettimeofday returns a struct timeval, and the other reason is that ktime_get() uses the monotonic clock.
This patch use ktime_us_delta to get the elapsed time, and in this way it no longer needs to check for the overflow, because ktime_us_delta returns time difference of microsecond.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> --- drivers/net/irda/nsc-ircc.c | 8 +++----- drivers/net/irda/nsc-ircc.h | 6 +++--- 2 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/net/irda/nsc-ircc.c b/drivers/net/irda/nsc-ircc.c index e7317b1..cabb82e 100644 --- a/drivers/net/irda/nsc-ircc.c +++ b/drivers/net/irda/nsc-ircc.c @@ -1501,10 +1501,8 @@ static netdev_tx_t nsc_ircc_hard_xmit_fir(struct sk_buff *skb, mtt = irda_get_mtt(skb); if (mtt) { /* Check how much time we have used already */ - do_gettimeofday(&self->now); - diff = self->now.tv_usec - self->stamp.tv_usec; - if (diff < 0) - diff += 1000000; + self->now = ktime_get(); + diff = ktime_us_delta(self->now, self->stamp); /* Check if the mtt is larger than the time we have * already used by all the protocol processing @@ -1867,7 +1865,7 @@ static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase) * reduce the min turn time a bit since we will know * how much time we have used for protocol processing */ - do_gettimeofday(&self->stamp); + self->stamp = ktime_get(); skb = dev_alloc_skb(len+1); if (skb == NULL) { diff --git a/drivers/net/irda/nsc-ircc.h b/drivers/net/irda/nsc-ircc.h index 32fa582..dd2185a 100644 --- a/drivers/net/irda/nsc-ircc.h +++ b/drivers/net/irda/nsc-ircc.h @@ -28,7 +28,7 @@ #ifndef NSC_IRCC_H #define NSC_IRCC_H -#include <linux/time.h> +#include <linux/ktime.h> #include <linux/spinlock.h> #include <linux/pm.h> @@ -263,8 +263,8 @@ struct nsc_ircc_cb { __u8 ier; /* Interrupt enable register */ - struct timeval stamp; - struct timeval now; + ktime_t stamp; + ktime_t now; spinlock_t lock; /* For serializing operations */ -- 1.7.9.5
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