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From:   Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Date:   Tue, 21 May 2019 12:19:18 -0300
To:     Michael Petlan <mpetlan@redhat.com>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
        Vitaly Chikunov <vt@altlinux.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Hendrik Brueckner <brueckner@linux.ibm.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Kim Phillips <kim.phillips@arm.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Subject: Re: [PATCH] perf arm64: Fix mksyscalltbl when system kernel headers
 are ahead of the kernel
Message-ID: <20190521151918.GD26253@kernel.org>
References: <20190521030203.1447-1-vt@altlinux.org>
 <20190521132838.GB26253@kernel.org>
 <alpine.LRH.2.20.1905211632300.4243@Diego>
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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