linux-kernel - Re: linux-next: build warnings

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Date:   Tue, 02 May 2017 19:53:25 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Paul Mackerras <paulus@...abs.org>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warnings

Stephen Rothwell <sfr@...b.auug.org.au> writes:

> Hi all,
>
> The linux-next build (powerpc allyesconfig) produced these warnings
> (and have for a while):
>
> arch/powerpc/kvm/book3s_pr_papr.c: In function 'kvmppc_h_pr_enter':
> arch/powerpc/kvm/book3s_pr_papr.c:53:2: warning: ignoring return value of 'copy_from_user', declared with attribute warn_unused_result [-Wunused-result]
>   copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
>   ^

Thanks, I had seen them, but they're KVM so I'll leave them to Paul to
fix up.

Though we are supposed to be building with -Werror, so those should be
breaking the build. I assume you have turned Werror off?

cheers