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Subject: Re: [patch V4 part 3 29/29] x86/entry/32: Convert IRET exception to
 IDTENTRY_SW
To:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>
Cc:     x86@kernel.org, "Paul E. McKenney" <paulmck@kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Petr Mladek <pmladek@suse.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Joel Fernandes <joel@joelfernandes.org>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        Brian Gerst <brgerst@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Will Deacon <will@kernel.org>
References: <20200505134354.774943181@linutronix.de>
 <20200505134906.128769226@linutronix.de>
From:   Alexandre Chartre <alexandre.chartre@oracle.com>
Message-ID: <e50333c6-386d-6b77-dd67-ea213782b1b7@oracle.com>
Date:   Thu, 7 May 2020 18:47:17 +0200
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On 5/5/20 3:44 PM, Thomas Gleixner wrote:
> From: Thomas Gleixner <tglx@linutronix.de>
> 
> Convert the IRET exception handler to IDTENTRY_SW. This is slightly
> different than the conversions of hardware exceptions as the IRET exception
> is invoked via an exception table when IRET faults. So it just uses the
> IDTENTRY_SW mechanism for consistency. It does not emit ASM code as it does
> not fit the other idtentry exceptions.
> 
>    - Implement the C entry point with DEFINE_IDTENTRY_SW() which maps to
>      DEFINE_IDTENTRY()
>    - Fixup the XEN/PV code
>    - Remove the old prototyoes
>    - Remove the RCU warning as the new entry macro ensures correctness
> 
> No functional change.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> 

For all patches of part 3:

Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>

alex