2012/10/9 Fengguang Wu <fengguang.wu@xxxxxxxxx>:
> Hi Frederic,
>
> FYI, kernel build failed on
>
> tree: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2012.10.08a
> head: 39083e8d47ddbc78412249d01c1ed63d7fd14c50
> commit: 13ec2e2650c8f82380178ad0b1b29a5d5c3ea557 [17/21] rcu: Remove rcu_switch()
> config: um-defconfig
>
> All error/warnings:
>
> arch/um/drivers/mconsole_kern.c: In function 'stack_proc':
> arch/um/drivers/mconsole_kern.c:708:2: error: implicit declaration of function 'rcu_switch' [-Werror=implicit-function-declaration]
> cc1: some warnings being treated as errors
>
> vim +708 arch/um/drivers/mconsole_kern.c
>
> 4111b025 Jeff Dike 2006-01-06 702
> 6f517d3f Jeff Dike 2006-01-06 703 static void stack_proc(void *arg)
> 6f517d3f Jeff Dike 2006-01-06 704 {
> 6f517d3f Jeff Dike 2006-01-06 705 struct task_struct *from = current, *to = arg;
> 6f517d3f Jeff Dike 2006-01-06 706
> 6f517d3f Jeff Dike 2006-01-06 707 to->thread.saved_task = from;
> 04e7e951 Frederic Weisbecker 2012-07-16 @708 rcu_switch(from, to);
> 6f517d3f Jeff Dike 2006-01-06 709 switch_to(from, to, from);
> 6f517d3f Jeff Dike 2006-01-06 710 }
> 6f517d3f Jeff Dike 2006-01-06 711
>
> The code at line 708 was first introduced by commit:
> 04e7e95 rcu: Switch task's syscall hooks on context switch
Thanks for your report!
Paul, do you want me to resend with fix included or as a delta?
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