Re: [PATCH v3 4/6] timerfd: Factor out timer-type unspecific timerfd_expire()

From: Thomas Gleixner
Date: Thu Feb 20 2014 - 05:52:04 EST


On Thu, 20 Feb 2014, Alexey Perevalov wrote:

> From: Anton Vorontsov <anton@xxxxxxxxxx>
>
> There is nothing hrtimer-specific inside the timerfd_tmrproc(), except
> the function prototype. We're about to add other timer types, so factor
> out generic timerfd_expire() helper from timerfd_tmrproc().

This changelog is completely useless. How is timerfd_tmrproc, which is
not a function but a function pointer, related to the patch?

Moving duplicated code to a common function is nice, but ....

> Signed-off-by: Anton Vorontsov <anton.vorontsov@xxxxxxxxxx>
> Signed-off-by: Alexey Perevalov <a.perevalov@xxxxxxxxxxx>
> ---
> fs/timerfd.c | 40 +++++++++++++++++++---------------------
> 1 file changed, 19 insertions(+), 21 deletions(-)
>
> diff --git a/fs/timerfd.c b/fs/timerfd.c
> index 9293121..3561ce7 100644
> --- a/fs/timerfd.c
> +++ b/fs/timerfd.c
> @@ -229,6 +229,23 @@ static unsigned int timerfd_poll(struct file *file, poll_table *wait)
> return events;
> }
>
> +static u64 timerfd_rearm(struct timerfd_ctx *ctx)
> +{
> + u64 orun;
> +
> + if (isalarm(ctx)) {
> + orun += alarm_forward_now(
> + &ctx->t.alarm, ctx->tintv) - 1;
> + alarm_restart(&ctx->t.alarm);
> + } else {
> + orun += hrtimer_forward_now(&ctx->t.tmr,
> + ctx->tintv) - 1;
> + hrtimer_restart(&ctx->t.tmr);

Warnings are there to be ignored and testing of user space
interfaces after a change is overrated, right?

Aside of that you just blindly copied the original code w/o fixing up
the now unnecessary line breaks.

The summary of this patch is:

1) Breaks existing functionality including user space ABI
2) Compiler warnings ignored
3) Untested
4) Utter lack of programming style
5) Useless changelog

Impressive for a trivial thing like this.

Thanks,

tglx
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