Date: Wed, 2 Dec 2015 00:24:49 +0100 (CET)
From: Jiri Kosina <jikos@kernel.org>
To: Petr Mladek <pmladek@suse.com>
cc: kbuild test robot <lkp@intel.com>, kbuild-all@01.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Russell King <rmk+kernel@arm.linux.org.uk>,
        Daniel Thompson <daniel.thompson@linaro.org>,
        Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org, x86@kernel.org,
        linux-arm-kernel@lists.infradead.org,
        adi-buildroot-devel@lists.sourceforge.net, linux-cris-kernel@axis.com,
        linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org,
        linux-s390@vger.kernel.org, linux-sh@vger.kernel.org,
        sparclinux@vger.kernel.org, David Howells <dhowells@redhat.com>,
        Koichi Yasutake <yasutake.koichi@jp.panasonic.com>,
        linux-am33-list@redhat.com
Subject: Re: [PATCH v2 1/5] printk/nmi: Generic solution for safe printk in
 NMI
In-Reply-To: <20151127153804.GC2648@pathway.suse.cz>
Message-ID: <alpine.LNX.2.00.1512020022460.32500@pobox.suse.cz>
References: <1448622572-16900-2-git-send-email-pmladek@suse.com> <201511271919.aEZuZKNe%fengguang.wu@intel.com> <20151127153804.GC2648@pathway.suse.cz>
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On Fri, 27 Nov 2015, Petr Mladek wrote:

> MN10300 has its own implementation for entering and exiting NMI 
> handlers. It does not call nmi_enter() and nmi_exit(). Please, find 
> below an updated patch that adds printk_nmi_enter() and 
> printk_nmi_exit() to the custom entry points. Then we could add HAVE_NMI 
> to arch/mn10300/Kconfig and avoid the above warning.

Hmm, so what exactly would go wrong if MN10300 (whatever that architecture 
is) would call nmi_enter() and nmi_exit() at the places where it's 
starting and finishing NMI handler?

>From a cursory look, it seems like most (if not all) of the things called 
from nmi_{enter,exit}() would be nops there anyway.

Thanks,

-- 
Jiri Kosina
SUSE Labs

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