linux-kernel - Re: linux-next: build warning after merge of the tip tree

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Date:   Tue, 23 Nov 2021 16:21:37 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the tip tree

Hi all,

On Fri, 17 Sep 2021 10:23:48 +0200 Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Fri, Sep 17, 2021 at 11:58:59AM +1000, Stephen Rothwell wrote:
> > 
> > After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> > produced this warning:
> > 
> > vmlinux.o: warning: objtool: mce_setup()+0x22: call to memset() leaves .noinstr.text section
> > vmlinux.o: warning: objtool: do_machine_check()+0x51: call to mce_gather_info() leaves .noinstr.text section  
> 
> Those are pre-existing and Boris is lokoing into them

I am still seeing the above 2 warnings and also now:

vmlinux.o: warning: objtool: xen_get_debugreg()+0xb: call to HYPERVISOR_get_debugreg() leaves .noinstr.text section
vmlinux.o: warning: objtool: xen_set_debugreg()+0x15: call to HYPERVISOR_set_debugreg.isra.0() leaves .noinstr.text section

Presumably caused by

  f4afb713e5c3 ("x86/xen: Make get_debugreg() noinstr")
  7361fac0465b ("x86/xen: Make set_debugreg() noinstr")

-- 
Cheers,
Stephen Rothwell

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