linux-kernel - linux-next: build failure after merge of the rcu tree

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Date:   Tue, 18 Oct 2022 10:26:36 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the rcu tree

Hi all,

After merging the rcu tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

ERROR: modpost: "srcu_check_nmi_safety" [arch/x86/kvm/kvm.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [arch/x86/kvm/kvm-intel.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [arch/x86/kvm/kvm-amd.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [kernel/rcu/rcutorture.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [kernel/rcu/rcuscale.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [kernel/rcu/refscale.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [fs/dlm/dlm.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [drivers/pci/controller/vmd.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [drivers/char/ipmi/ipmi_msghandler.ko] undefined!
ERROR: modpost: "srcu_check_nmi_safety" [drivers/gpu/drm/drm.ko] undefined!
WARNING: modpost: suppressed 10 unresolved symbol warnings because there were too many)

Presumably caused by commit

  54a118fce487 ("srcu: Debug NMI safety even on archs that don't require it")

I have used the rcu tree from next-20221017 for today.

-- 
Cheers,
Stephen Rothwell

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