linux-kernel - Re: [announce] new tree: "fix all build warnings, on all configs"

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Message-ID: <ada3aiv9k6j.fsf@cisco.com>
Date:	Fri, 17 Oct 2008 10:59:48 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Howells <dhowells@...hat.com>
Subject: Re: [announce] new tree: "fix all build warnings, on all configs"

 > diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c
 > index c83f88c..d1230a8 100644
 > --- a/drivers/net/mlx4/mcg.c
 > +++ b/drivers/net/mlx4/mcg.c
 > @@ -215,7 +215,7 @@ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
 >  
 >  	if (block_mcast_loopback)
 >  		mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
 > -						       (1 << MGM_BLCK_LB_BIT));
 > +						       (1U << MGM_BLCK_LB_BIT));

This is fixing a warning caused by a gcc bug
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37261) which is fixed
upstream.  The change is rather inoffensive but on the other hand I'm
not sure what our policy for dealing with version-specific warning bugs
in gcc should be.

 - R.
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