From: Linus Torvalds <[email protected]>
Date: Thu, 8 Sep 2005 09:27:56 -0700 (PDT)
> Mistakes happen, and the way you fix them is not to pull a tantrum, but
> tell people that they are idiots and they broke something, and get them to
> fix it instead.
In all this noise I still haven't seen what is wrong with
the build warning fix I made.
Even as networking maintainer, other people put changes into the
networking as build or warning fixes, and I have to live with that.
If I don't like what happened, I call it out and send in a more
appropriate fix. This is never something worth peeing my pants in
public about.
Anyways, let's discuss the concrete problem here.
The previous definition of uart_handle_sysrq_char(), when
SUPPORT_SYSRQ was disabled, was a plain macro define to "(0)" but this
makes gcc emit empty statement warnings (and rightly so) in cases such
as:
if (tty == NULL) {
uart_handle_sysrq_char(&up->port, ch, regs);
continue;
}
(that example is from drivers/sun/sunsab.c)
So I changed it so that it was an inline function, borrowing the
existing code, so that we get the warning erased _and_ we get type
checking even when SUPPORT_SYSRQ is disabled. So we end up with:
static inline int
uart_handle_sysrq_char(struct uart_port *port, unsigned int ch,
struct pt_regs *regs)
{
#ifdef SUPPORT_SYSRQ
if (port->sysrq) {
if (ch && time_before(jiffies, port->sysrq)) {
handle_sysrq(ch, regs, NULL);
port->sysrq = 0;
return 1;
}
port->sysrq = 0;
}
#endif
return 0;
}
which is what is there now. I can't see what's so wrong with that.
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