From: Borislav Petkov <bp@alien8.de>
To: Dave Haywood <tla@oak.selfip.net>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Build warning: kernel/trace/trace.c (v3.2-rc1-90-g19e0baf)
Date: Wed, 9 Nov 2011 12:33:03 +0100 [thread overview]
Message-ID: <20111109113303.GA18508@gere.osrc.amd.com> (raw)
In-Reply-To: <4EBA3E3E.9060402@oak.selfip.net>
On Wed, Nov 09, 2011 at 08:47:58AM +0000, Dave Haywood wrote:
> Hi,
>
> Noticed this new warning in the build of kernel v3.2-rc1-90-g19e0baf:
>
> CC kernel/trace/trace.o
> kernel/trace/trace.c: In function 'tracing_mark_write':
> kernel/trace/trace.c:3644:8: warning: 'page2' may be used uninitialized in this function
That has to be gcc 4.5.x something. 4.6 is smarter in that aspect:
$ make CC=gcc-4.6 kernel/trace/trace.o
CHK include/linux/version.h
UPD include/linux/version.h
CHK include/generated/utsrelease.h
UPD include/generated/utsrelease.h
CC kernel/bounds.s
...
HOSTLD scripts/mod/modpost
CC kernel/trace/trace.o
$ make CC=gcc-4.5 kernel/trace/trace.o
CHK include/linux/version.h
CHK include/generated/utsrelease.h
CC kernel/bounds.s
...
HOSTLD scripts/mod/modpost
CC kernel/trace/trace.o
kernel/trace/trace.c: In function ‘tracing_mark_write’:
kernel/trace/trace.c:3644:8: warning: ‘page2’ may be used uninitialized in this function
HTH
--
Regards/Gruss,
Boris.
next prev parent reply other threads:[~2011-11-09 11:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-09 8:47 Build warning: kernel/trace/trace.c (v3.2-rc1-90-g19e0baf) Dave Haywood
2011-11-09 11:33 ` Borislav Petkov [this message]
2011-11-10 1:11 ` Dave Haywood
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