linux-kernel - Re: [PATCH] Staging:dgap :Compression of lines for immediate return

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Date:	Sun, 26 Jul 2015 12:39:24 -0700
From:	Joe Perches <joe@...ches.com>
To:	Shraddha Barke <shraddha.6596@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Staging:dgap :Compression of lines for immediate return

On Sun, 2015-07-26 at 23:04 +0530, Shraddha Barke wrote:
> This patch compresses two lines into a single line if immediate return statement
> is found. Also,remove variable rc as it is no longer needed.
> It is done using tool Coccinelle. And semantic patch used for this is as follows:
> 
> @@
> expression ret;
> identifier f;
> @@
> -ret =
> +return
>      f(...);
> -return ret;

This isn't an always safe or side-effect free
semantic patch as there may be a cast lost by
such a conversion.

int foo(void)
{
	char i = 0xffffffff;
	return i;
}

where i is now int not char

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