linux-kernel - Re: [kbuild-all] Re: [PATCH] gcov: fail build on gcov

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Message-ID: <db88186a-d6af-33c9-f1fb-10b673b8fdd6@intel.com>
Date:   Fri, 12 Mar 2021 11:49:39 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        kernel test robot <lkp@...el.com>
Cc:     Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [kbuild-all] Re: [PATCH] gcov: fail build on gcov_info size
 mismatch



On 3/12/21 4:02 AM, Linus Torvalds wrote:
> On Thu, Mar 11, 2021 at 11:34 AM kernel test robot <lkp@...el.com> wrote:
>>>> kernel/gcov/geninfosize.sh: 13: [: =: unexpected operator
> Wth? I'm not seeing how this can fail on nds32 - doesn't look like a
> bashism, everything is properly quoted, etc etc. Plus it's a
> cross-compile anyway, so the shell in question should be the same as
> on all the other architectures.
>
> Presumably the nds32 assembly contains something odd and unexpected,
> but with the quoting, I can't see how even that could matter.
>
> Yeah, the test itself could probably be simplified to testing both
> conditions at the same time:
>
>    [ "$a $b" = ".size .LPBX0," ]
>
> but that's a separate issue.
>
> Funky. What am I missing? Presumably something really stupid.
>
>                 Linus

Hi Linus,

The issue is from a=!, and [ "$a $b" = ".size .LPBX0," ] can avoid the 
error.

+ [ ! = .size -a ABI = .LPBX0, ]
./kernel/gcov/geninfosize.sh: 13: [: =: unexpected operator

Best Regards,
Rong Chen