linux-kernel - Re: arch/powerpc/xmon/dis-asm.h: 2 * wrong specifiers ?

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Message-ID: <CAMzoambZ9wu3orkFfYemTQiMpf+OWPdk8v6_SXsJapS74HE13A@mail.gmail.com>
Date:	Tue, 28 Jun 2016 08:06:56 +0100
From:	David Binderman <linuxdev.baldrick@...il.com>
To:	Michael Ellerman <mpe@...erman.id.au>
Cc:	benh@...nel.crashing.org, paulus@...ba.org,
	linuxppc-dev@...ts.ozlabs.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dcb314@...mail.com
Subject: Re: arch/powerpc/xmon/dis-asm.h: 2 * wrong specifiers ?

Hello there,

On Tue, Jun 28, 2016 at 5:08 AM, Michael Ellerman <mpe@...erman.id.au> wrote:
> What config / toolchain are you using? I've never seen these.

A static analyser for C & C++ called cppcheck. Available from sourceforge.

I think you can also get a similar warning if you tweek the gcc compiler warning
flags. -Wformat=2 maybe.

>> static inline int print_insn_powerpc(unsigned long insn, unsigned long memaddr)
>> {
>>     printf("%.8x", insn);
>>     return 0;
>> }
>
> Send me a patch to cast insn to unsigned int?

I don't know the code, but given that insn is unsigned long and so can go
past 32 bits, using a cast to unsigned int might throw away the
possibly important
upper bits.

Regards

David Binderman