* Build error on kernel/rcutree.c
@ 2013-01-13 18:03 Fabio Estevam
2013-01-13 18:12 ` Paul E. McKenney
0 siblings, 1 reply; 2+ messages in thread
From: Fabio Estevam @ 2013-01-13 18:03 UTC (permalink / raw)
To: linux-arm-kernel
Hi Paul,
When building ARM imx_v4_v5_defconfig the following error shows up on
linux-next 20130111:
kernel/rcutree.c:808:2: error: implicit declaration of function
'rcu_jiffies_till_stall_check' [-Werror=implicit-function-declaration]
kernel/rcutree.c:941:6: error: 'rcu_cpu_stall_suppress' undeclared
(first use in this function)
Is this a known issue?
Regards,
Fabio Estevam
^ permalink raw reply [flat|nested] 2+ messages in thread
* Build error on kernel/rcutree.c
2013-01-13 18:03 Build error on kernel/rcutree.c Fabio Estevam
@ 2013-01-13 18:12 ` Paul E. McKenney
0 siblings, 0 replies; 2+ messages in thread
From: Paul E. McKenney @ 2013-01-13 18:12 UTC (permalink / raw)
To: linux-arm-kernel
On Sun, Jan 13, 2013 at 04:03:24PM -0200, Fabio Estevam wrote:
> Hi Paul,
>
> When building ARM imx_v4_v5_defconfig the following error shows up on
> linux-next 20130111:
>
> kernel/rcutree.c:808:2: error: implicit declaration of function
> 'rcu_jiffies_till_stall_check' [-Werror=implicit-function-declaration]
> kernel/rcutree.c:941:6: error: 'rcu_cpu_stall_suppress' undeclared
> (first use in this function)
>
> Is this a known issue?
Yes, the fix is in -rcu and should make it to -next soon.
In the meantime, you can work around the problem by avoiding selecting
CONFIG_TREE_PREEMPT_RCU=y on SMP=n builds -- use CONFIG_TINY_PREEMPT_RCU
instead.
Thanx, Paul
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