From mboxrd@z Thu Jan  1 00:00:00 1970
From: LW@KARO-electronics.de (=?utf-8?Q?Lothar_Wa=C3=9Fmann?=)
Date: Wed, 7 Aug 2013 09:44:42 +0200
Subject: [BUG linux-next] watchdog: build breakage for non-SMP builds
Message-ID: <20993.64234.352390.254920@ipc1.ka-ro>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi,

commit 0ce6966b "watchdog: update watchdog_tresh properly" breaks
build on non-SMP systems (more specifically: on systems where
CONFIG_USE_GENERIC_SMP_HELPERS is not set):
linux-next/kernel/watchdog.c: In function 'update_timers':
linux-next/kernel/watchdog.c:522:2: error: implicit declaration of function '__smp_call_function_single' [-Werror=implicit-function-declaration]

I guess the offending code should be guarded by an
'#ifdef CONFIG_USE_GENERIC_SMP_HELPERS'
like in kernel/softirq.c:
#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
[...]
static int __try_remote_softirq(struct call_single_data *cp, int cpu, int softirq)
{
        if (cpu_online(cpu)) {
                cp->func = remote_softirq_receive;
                cp->info = &softirq;
                cp->flags = 0;

                __smp_call_function_single(cpu, cp, 0);
                return 0;
        }
        return 1;
}
#else /* CONFIG_USE_GENERIC_SMP_HELPERS */
static int __try_remote_softirq(struct call_single_data *cp, int cpu, int softirq)
{
        return 1;
}
#endif


Lothar Wa?mann
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