linux-kernel - RE: [PATCH 1/2][v2] cpuidle-haltpoll: Replace default_idle with arch_cpu

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Message-ID: <3fb3526aa012449db95767c6092da8f6@baidu.com>
Date:   Thu, 8 Dec 2022 12:41:23 +0000
From:   "Li,Rongqing" <lirongqing@...du.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "jpoimboe@...nel.org" <jpoimboe@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: RE: [PATCH 1/2][v2] cpuidle-haltpoll: Replace default_idle with
 arch_cpu_idle

> >
> > When cpuidle-haltpoll is built as module,
> 
> But it isn't now.

Centos is compiling it as module, it will fail;
Other user wants to compile it as module, they will fail, 
Syzbot random configuration building will fail

Unless prohibit to build it as module as below:

config HALTPOLL_CPUIDLE
-        tristate "Halt poll cpuidle driver"
+        bool "Halt poll cpuidle driver"
        depends on X86 && KVM_GUEST
        default y
        help


thanks

-Li