From mboxrd@z Thu Jan 1 00:00:00 1970 From: paulmck@linux.vnet.ibm.com (Paul E. McKenney) Date: Sun, 13 Jan 2013 10:12:45 -0800 Subject: Build error on kernel/rcutree.c In-Reply-To: References: Message-ID: <20130113181245.GK3384@linux.vnet.ibm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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