On Tue, 29 Apr 2014, Cyrill Gorcunov wrote:
> +
> +static ssize_t timerfd_write(struct file *file, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct timerfd_ctx *ctx = file->private_data;
> + u64 ticks = 0;
> +
> + if (count < sizeof(ticks))
> + return -EINVAL;
> +
> + if (get_user(ticks, (u64 __user *) buf))
> + return -EFAULT;
> +
> + spin_lock_irq(&ctx->wqh.lock);
> + ctx->ticks = ticks;
So what wakes a potential waiter in read/poll?
Thanks,
tglx
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