linux-kernel - Re: [3/6] kgdb: core

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Message-Id: <200802102020.45829.bzolnier@gmail.com>
Date:	Sun, 10 Feb 2008 20:20:45 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Marcin Slusarz <marcin.slusarz@...il.com>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@....com.au>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Wessel <jason.wessel@...driver.com>
Subject: Re: [3/6] kgdb: core

On Sunday 10 February 2008, Ingo Molnar wrote:
> 
> * Marcin Slusarz <marcin.slusarz@...il.com> wrote:
> 
> > > +		if (CACHE_FLUSH_IS_SAFE) {
> > > +			if (current->mm && addr < TASK_SIZE) {
> > > +				flush_cache_range(current->mm->mmap_cache,
> > > +						addr, addr + BREAK_INSTR_SIZE);
> > > +			} else {
> > > +				flush_icache_range(addr, addr +
> > > +						BREAK_INSTR_SIZE);
> > > +			}
> > > +		}
> > unneeded braces (here and in many other places)
> 
> this is a small detail, but you are wrong. These braces around 
> multi-line statements are unneded _for the compiler_, but are very much 
> wanted by humans. You'll see akpm, me and others reject/fix patches on a 
> routine basis that make this cleanliness mistake. Please watch out for 
> this when writing patches ;-)
> 
> > if ()
> > else if ()
> > else
> > 
> > will look better
> 
> nope. I consciously avoid that construct because it's dangerous: it can 
> quite easily result in the wrong logic. Having _more_ braces than needed 
> by the compiler is a style error in only a single, special case.

however it can be still made to:

if () {
	if ()
	else
}

[ not fixed in v6 ]
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