linux-kernel - Re: [PATCH] fs/ext4/extents_status.c: fix 64-bit number truncation bug

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Message-ID: <20140407041431.GA8468@thunk.org>
Date:	Mon, 7 Apr 2014 00:14:31 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Chen Gang <gang.chen.5i5j@...il.com>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Guan Xuetao <gxt@...c.pku.edu.cn>
Subject: Re: [PATCH] fs/ext4/extents_status.c: fix 64-bit number truncation
 bug

On Sun, Apr 06, 2014 at 03:39:09PM +0200, Geert Uytterhoeven wrote:
> On Mon, Mar 31, 2014 at 3:16 PM, Chen Gang <gang.chen.5i5j@...il.com> wrote:
> > '0x7FDEADBEEF' will be truncated to 32-bit number under unicore32. Need
> > append 'ULL' for it.
> >
> > The related warning (with allmodconfig under unicore32):
> >
> >     CC [M]  fs/ext4/extents_status.o
> >   fs/ext4/extents_status.c: In function ‘__es_remove_extent’:
> >   fs/ext4/extents_status.c:813: warning: integer constant is too large for ‘long’ type
> 
> Thanks! This is failing on all 32-bit architectures.

Yes, it's harmless (since we don't actually check the value anywhere;
this is just so humans could easily spot bugs when debugging), but
I'll make sure this gets queued for 3.15 fixes in the ext4 tree.

Thanks!!

Signed-off-by: "Theodore Ts'o" <tytso@....edu>

						- Ted
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