linux-kernel - Re: [CRED bug?] 2.6.29-rc3 don't survive on stress workload

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Message-ID: <1576.1234372068@redhat.com>
Date:	Wed, 11 Feb 2009 17:07:48 +0000
From:	David Howells <dhowells@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	dhowells@...hat.com,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Serge Hallyn <serue@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>
Subject: Re: [CRED bug?] 2.6.29-rc3 don't survive on stress workload

Ingo Molnar <mingo@...e.hu> wrote:

> include/linux/cred.h: In function 'get_cred':
> include/linux/cred.h:188: warning: passing argument 1 of 'get_new_cred' discards 
> qualifiers from pointer target type

This is a known compiler bug in some versions of gcc.  It fails to observe the
fact that a const pointer is cast to the equivalent non-const pointer in
get_cred():

	static inline const struct cred *get_cred(const struct cred *cred)
	{
		return get_new_cred((struct cred *) cred);
	}

David
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