linux-kernel - RE: [PATCH] usb: remove redundant conditions

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Date:	Thu, 10 Dec 2015 15:17:21 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Felipe Balbi' <balbi@...com>,
	"Geyslan G. Bem" <geyslan@...il.com>,
	"peter.senna@...il.com" <peter.senna@...il.com>
CC:	"Geyslan G. Bem" <geyslan@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johan Hovold <johan@...nel.org>,
	Robert Baldyga <r.baldyga@...sung.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] usb: remove redundant conditions

From: Felipe Balbi
> Sent: 10 December 2015 15:14
> "Geyslan G. Bem" <geyslan@...il.com> writes:
> 
> > This patch removes redundant conditions.
> >
> >  - (!A || (A && B)) is the same as (!A || B).
> >  - (length && length > 5) can be reduced to a single evaluation.
> >
> > Caught by: cppcheck
> >
> > Signed-off-by: Geyslan G. Bem <geyslan@...il.com>
> > ---
> 
> I guess you didn't get previous comment in time; let's split this per
> driver so different maintainers can pick their parts.

I also suspect that gcc will optimise out the redundant checks as well.

	David

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