linux-kernel - Re: [PATCH rcu v2 17/20] kvm: Remove "select SRCU"

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Message-ID: <20230118035629.GT2948950@paulmck-ThinkPad-P17-Gen-1>
Date:   Tue, 17 Jan 2023 19:56:29 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...a.com, rostedt@...dmis.org,
        Huacai Chen <chenhuacai@...nel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, kvm@...r.kernel.org,
        Marc Zyngier <maz@...nel.org>,
        Anup Patel <anup@...infault.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        John Ogness <john.ogness@...utronix.de>
Subject: Re: [PATCH rcu v2 17/20] kvm: Remove "select SRCU"

On Wed, Jan 18, 2023 at 01:27:36AM +0000, Sean Christopherson wrote:
> On Thu, Jan 12, 2023, Paul E. McKenney wrote:
> > Now that the SRCU Kconfig option is unconditionally selected, there is
> > no longer any point in selecting it.  Therefore, remove the "select SRCU"
> > Kconfig statements from the various KVM Kconfig files.
> > 
> > Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> > Cc: Huacai Chen <chenhuacai@...nel.org>
> > Cc: Aleksandar Markovic <aleksandar.qemu.devel@...il.com>
> > Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> > Cc: Michael Ellerman <mpe@...erman.id.au>
> > Cc: Christophe Leroy <christophe.leroy@...roup.eu>
> > Cc: Sean Christopherson <seanjc@...gle.com>
> > Cc: Paolo Bonzini <pbonzini@...hat.com>
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > Cc: Ingo Molnar <mingo@...hat.com>
> > Cc: Borislav Petkov <bp@...en8.de>
> > Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> > Cc: "H. Peter Anvin" <hpa@...or.com>
> > Cc: <kvm@...r.kernel.org>
> > Acked-by: Marc Zyngier <maz@...nel.org> (arm64)
> > Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)
> > Acked-by: Anup Patel <anup@...infault.org> (riscv)
> > Acked-by: Heiko Carstens <hca@...ux.ibm.com> (s390)
> > Reviewed-by: John Ogness <john.ogness@...utronix.de>
> > ---
> 
> Reviewed-by: Sean Christopherson <seanjc@...gle.com>
> 
> 
> Ugh, my apologies Paul.  I didn't realize 0cd7e350abc4 ("rcu: Make SRCU mandatory")
> is already in Linus' tree, i.e. bundling this in a single patch was unnecessary work
> for you.
> 
> Anyways, since there isn't an external dependency, this can go through the KVM
> tree.  Unless you prefer to take it directly, I'll make sure Paolo sends it along
> at some point before v6.2 final.

I am very happy to have you guys take it.  Just let me know when you
have it in place, and I will drop my copy on my next rebase after that.

							Thanx, Paul