linux-kernel - Re: [PATCH] perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel

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Message-ID: <20190521151918.GD26253@kernel.org>
Date:   Tue, 21 May 2019 12:19:18 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Michael Petlan <mpetlan@...hat.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Vitaly Chikunov <vt@...linux.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Hendrik Brueckner <brueckner@...ux.ibm.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Kim Phillips <kim.phillips@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH] perf arm64: Fix mksyscalltbl when system kernel headers
 are ahead of the kernel

Em Tue, May 21, 2019 at 04:34:47PM +0200, Michael Petlan escreveu:
> On Tue, 21 May 2019, Arnaldo Carvalho de Melo wrote:
> > Em Tue, May 21, 2019 at 06:02:03AM +0300, Vitaly Chikunov escreveu:
> > > When a host system has kernel headers that are newer than a compiling
> > > kernel, mksyscalltbl fails with errors such as:
> > > 
> > >   <stdin>: In function 'main':
> > >   <stdin>:271:44: error: '__NR_kexec_file_load' undeclared (first use in this function)
> > >   <stdin>:271:44: note: each undeclared identifier is reported only once for each function it appears in
> > >   <stdin>:272:46: error: '__NR_pidfd_send_signal' undeclared (first use in this function)
> > >   <stdin>:273:43: error: '__NR_io_uring_setup' undeclared (first use in this function)
> > >   <stdin>:274:43: error: '__NR_io_uring_enter' undeclared (first use in this function)
> > >   <stdin>:275:46: error: '__NR_io_uring_register' undeclared (first use in this function)
> > >   tools/perf/arch/arm64/entry/syscalls//mksyscalltbl: line 48: /tmp/create-table-xvUQdD: Permission denied
> > > 
> > > mksyscalltbl is compiled with default host includes, but run with
> > 
> > It shouldn't :-\ So with this you're making it use the ones shipped in
> > tools/include? Good, I'll test it, thanks!
> > 
> > - Arnaldo
> > 
> 
> I've hit the issue too, this patch fixes it for me.
> Tested.

Thanks, I'll add your Tested-by, appreciated.

- Arnaldo